Keycloak 26.7.3 → 26.8.1
4 releases · 3 breaking changes · 56 security fixes · 1 advisory fixed
56security3breaking6deprecated22feature49fix
Vulnerabilities fixed by this upgrade
- 7.4 CVE-2026-90997 Replay protection bypass leads to unauthorized access via database driver semantics mismatch
Breaking changes
- breaking #51897 Deprecate route from AUTH_SESSION_ID cookie for sticky sessions in 26.8.0
- breaking #52130 Deprecate clusterless feature in 26.8.0
- breaking #52480 EOL Keycloak Realm Operator in 26.8.0
Security changes
- security #50945 [CVE-2026-15943] OIDC identity provider update reuses masked client secret after token URL changes identity-brokering in 26.8.1
- security #51381 [CVE-2026-18569] OIDC broker backchannel logout accepts unsigned forged logout tokens when signature validation is disabled oidc in 26.8.1
- security #52321 [CVE-2026-82968] Persistent wrong-account linking through null / GitHub identity provider identity-brokering in 26.8.1
- security #53057 [CVE-2026-94001] Admin credential DELETE bypasses denied reset-password permission admin/fine-grained-permissions in 26.8.1
- security #53060 [CVE-2026-94000] A delegated admin with only `manage-users` can become `realm-admin` by joining (or being created into) a group that maps an admin role admin/fine-grained-permissions in 26.8.1
- security #53070 [CVE-2026-94218] 2FA setup enforcement bypass via /realms/{realm}/login-actions/restart — #YWH-PGM40475-254 authentication in 26.8.1
- security #53071 [CVE-2026-94215] Cross-realm realm resource read/write via per-request session-level cache in RealmCacheSession admin/api in 26.8.1
- security #53072 [CVE-2026-94213] Missing user view authorization in the Authorization Services policy evaluation endpoint, possible incomplete fix of CVE-2026-37978 authorization-services in 26.8.1
- security #53073 [CVE-2026-94217] UMA scope merge across resource owners via name collision in resolveResourcePermission authorization-services in 26.8.1
- security #53111 [CVE-2026-96446] Security vulnerability in Keycloak 26.7.3 — PAR single-use bypass via prompt=none oidc in 26.8.1
- security #53112 [CVE-2026-96445] Conditional OTP trusts skip headers on untrusted proxy paths authentication in 26.8.1
- security #53158 [CVE-2026-97177] Generic user update bypasses denied reset-password permission admin/fine-grained-permissions in 26.8.1
- security #53159 [CVE-2026-95503] Potential KDC spoofing attack when Kerberos password authentication is enabled authentication in 26.8.1
- security #53160 [CVE-2026-97311] Broken access control in Admin REST API: roles/{role-name}/groups discloses groups the caller cannot view (incomplete fix of the 26.7.2 hardening) admin/api in 26.8.1
- security #53187 [CVE-2026-97846] Standard Token Exchange bypasses required mTLS certificate binding and issues an active bearer token when no client certificate is supplied token-exchange/standard in 26.8.1
- security #53338 [CVE-2026-101333] Unbounded metric series creation via idp tag on broker login endpoint observability in 26.8.1
- security #53388 CVE-2026-91777 com.fasterxml.jackson.core:jackson-databind dependencies in 26.8.1
- security #53393 Multiple CVEs in tools.jackson.core:jackson-databind dependencies in 26.8.1
- security #53419 [CVE-2026-103884] Path traversal via X.509 CRL Distribution Point - client-supplied CRL path escapes $KC_HOME/conf authentication in 26.8.1
- security #53582 Multiple CVEs in simple-git dependencies in 26.8.1
- security #53659 Flaky test: initial-access.spec.ts 'Initial access token' fails with TypeError on table data read admin/ui in 26.8.1
- security #53674 [CVE-2026-107121] SMTP starttls=true permits plaintext credential and message downgrade admin/api in 26.8.1
- security #53417 FGAP v2 custom role injection via oidc-hardcoded-role-mapper bypasses removeTransientAdminRoles (incomplete fix for CVE-2026-4629) admin/fine-grained-permissions in 26.8.1
- security #52792 Authenticator Reference is incorrectly masked after CVE-2026-16104 fix authentication in 26.8.1
- security Quickstart OID4VCI deployment - a playground for rapid prototyping with mdoc and SD-JWT credentials in 26.8.0
- security OID4VCI Demo in Keycloak FAPI playground - available to show the details of the OID4VCI protocol messages exchanged between wallet and issuer, and to illustrate advanced concepts like proofs, attestation, credential refresh, and more. in 26.8.0
- security #50444 [CVE-2026-12388] IdP mapper admin role escalation identity-brokering in 26.8.0
- security #50618 [CVE-2026-14781] OIDC broker applies id_token email_verified to userinfo email, marking unverified addresses as verified oidc in 26.8.0
- security #51865 [CVE-2026-19608] Name-only group claims let same-name groups satisfy path-specific group policies authorization-services in 26.8.0
- security #52168 CVE-2026-54515 CVE-2026-59889 com.fasterxml.jackson.core:jackson-databind 2.22.0 dist/quarkus in 26.8.0
- security #52169 CVE-2026-59903 io.netty:netty-codec-http:4.1.136.Final dist/quarkus in 26.8.0
- security #51699 Missing security headers on root-path redirect when http-relative-path is configured dist/quarkus in 26.8.0
- security #52642 SCIM user deletion skips security-state cleanup in 26.8.0
- security #52645 Bulk HQL executeUpdate bypasses AsyncCommitIntegrator security classification in 26.8.0
- security #52696 Recovered sites can enforce stale security configuration for up to one hour storage in 26.8.0
- security #52676 CVE-2026-4633 User enumeration via identity-first login when Organizations feature is enabled organizations in 26.8.0
- security #50996 [CVE-2026-16103] Incomplete fix for CVE-2026-9798 (Keycloak CIBA brute-force lockout bypass at token redemption) oidc in 26.7.5
- security #51278 [CVE-2026-18206] Client policy source-host wildcard domains match non-subdomain suffixes oidc in 26.7.5
- security #51280 [CVE-2026-18203] Group policy child-extension matches sibling group path prefixes authorization-services in 26.7.5
- security #51281 [CVE-2026-18207] Source-group condition matches duplicate group names and can skip negative-logic enforcement oidc in 26.7.5
- security #51284 [CVE-2026-18208] Inactive out-of-audience introspection responses can include a signed JWT claim oidc in 26.7.5
- security #51285 [CVE-2026-18211] Secure-client-uris localhost exception accepts localhost-prefixed attacker domains oidc in 26.7.5
- security #51781 [CVE-2026-18217] SAML Redirect Binding Parameter Pollution saml in 26.7.5
- security #52531 CVE-2025-66021 com.googlecode.owasp-java-html-sanitizer:owasp-java-html-sanitizer dependencies in 26.7.5
- security #52692 [CVE-2026-89298] Confidential client secret disclosed to view-clients role via Client Registration GET oidc in 26.7.5
- security #52783 [CVE-2026-88770] Device Authorization Grant issues tokens to brute-force-locked accounts (sibling of CVE-2026-9798) oidc in 26.7.5
- security #52888 CVE-2026-84939 org.freemarker:freemarker in 26.7.5
- security #52972 CVE-2026-8798 org.bouncycastle:bc-fips dependencies in 26.7.5
- security #52974 CVE-2026-13505 org.bouncycastle:bc-fips dependencies in 26.7.5
- security #53074 [CVE-2026-93999] Keycloak 26.7.2: token-exchange refresh continues issuing tokens for a disabled audience client token-exchange in 26.7.5
- security #52834 [CVE-2026-90997] Default MySQL/MariaDB row counts make stateless replay gates accept reused artifacts in 26.7.4
- security #52835 [CVE-2026-79651] Keycloak Unauthenticated Denial of Service via Unbounded Locale Caching in 26.7.4
- security #52836 [CVE-2026-74909] Incomplete fix: percent-encoded semicolon bypasses matrix parameter stripping in PathMatcher in 26.7.4
- security #52837 [CVE-2026-19607] Username Takeover Leading to Account Lockout in 26.7.4
- security #52838 [CVE-2026-17526] Privilege escalation: the "impersonation" role can impersonate a realm administrator in 26.7.4
- security #52839 [CVE-2026-18212] SAML Redirect DEFLATE helpers leak native zlib state in 26.7.4
Deprecations
- deprecated #49239 Stop storing client private keys in the database and deprecate generate endpoints admin/rbac in 26.8.0
- deprecated #44062 Should Kerberos Credential delegation be deprecated? in 26.8.0
- deprecated #51921 Deprecate legacy OIDC client switches from 'OpenID Connect Compatibility Modes' oidc in 26.8.0
- deprecated #52121 Deprecate volatile sessions and allow opting out of session caching in 26.8.0
- deprecated #52923 Deprecate 'Full scope allowed' client switch oidc in 26.8.0
- deprecated #53219 Deprecate other client registration providers than OIDC in 26.8.0
Every release in between
security#50945 [CVE-2026-15943] OIDC identity provider update reuses masked client secret after token URL changes identity-brokering
security#51381 [CVE-2026-18569] OIDC broker backchannel logout accepts unsigned forged logout tokens when signature validation is disabled oidc
security#52321 [CVE-2026-82968] Persistent wrong-account linking through null / GitHub identity provider identity-brokering
security#53057 [CVE-2026-94001] Admin credential DELETE bypasses denied reset-password permission admin/fine-grained-permissions
security#53060 [CVE-2026-94000] A delegated admin with only `manage-users` can become `realm-admin` by joining (or being created into) a group that maps an admin role admin/fine-grained-permissions
security#53070 [CVE-2026-94218] 2FA setup enforcement bypass via /realms/{realm}/login-actions/restart — #YWH-PGM40475-254 authentication
security#53071 [CVE-2026-94215] Cross-realm realm resource read/write via per-request session-level cache in RealmCacheSession admin/api
security#53072 [CVE-2026-94213] Missing user view authorization in the Authorization Services policy evaluation endpoint, possible incomplete fix of CVE-2026-37978 authorization-services
security#53073 [CVE-2026-94217] UMA scope merge across resource owners via name collision in resolveResourcePermission authorization-services
security#53111 [CVE-2026-96446] Security vulnerability in Keycloak 26.7.3 — PAR single-use bypass via prompt=none oidc
security#53112 [CVE-2026-96445] Conditional OTP trusts skip headers on untrusted proxy paths authentication
security#53158 [CVE-2026-97177] Generic user update bypasses denied reset-password permission admin/fine-grained-permissions
security#53159 [CVE-2026-95503] Potential KDC spoofing attack when Kerberos password authentication is enabled authentication
security#53160 [CVE-2026-97311] Broken access control in Admin REST API: roles/{role-name}/groups discloses groups the caller cannot view (incomplete fix of the 26.7.2 hardening) admin/api
security#53187 [CVE-2026-97846] Standard Token Exchange bypasses required mTLS certificate binding and issues an active bearer token when no client certificate is supplied token-exchange/standard
security#53338 [CVE-2026-101333] Unbounded metric series creation via idp tag on broker login endpoint observability
security#53388 CVE-2026-91777 com.fasterxml.jackson.core:jackson-databind dependencies
security#53393 Multiple CVEs in tools.jackson.core:jackson-databind dependencies
security#53419 [CVE-2026-103884] Path traversal via X.509 CRL Distribution Point - client-supplied CRL path escapes $KC_HOME/conf authentication
security#53582 Multiple CVEs in simple-git dependencies
security#53659 Flaky test: initial-access.spec.ts 'Initial access token' fails with TypeError on table data read admin/ui
security#53674 [CVE-2026-107121] SMTP starttls=true permits plaintext credential and message downgrade admin/api
security#53417 FGAP v2 custom role injection via oidc-hardcoded-role-mapper bypasses removeTransientAdminRoles (incomplete fix for CVE-2026-4629) admin/fine-grained-permissions
fix#51268 Group members endpoint sometimes returns 200 and empty list instead of 500 when DB is down admin/api
fix#52139 Client sessions attached to offline user sessions via token exchange are created with OFFLINE_FLAG=0, causing orphaned OFFLINE_CLIENT_SESSION rows token-exchange
fix#52362 HttpServerUtil.sendResponse drops the headers it is given core
fix#52449 Organization invite: link in the plain-text part of the email is HTML-escaped and unusable organizations
security#52792 Authenticator Reference is incorrectly masked after CVE-2026-16104 fix authentication
fix#52927 Admin Console "Sign out" on one user session unexpectedly logs out a different, unrelated session for the same user authentication
fix#53029 Token introspection omits act claim for token-exchange delegation tokens token-exchange
fix#53142 Realm settings - security defenses admin/ui
fix#53370 RoleSelect lost its undefined guard on form values, so Permissions → Evaluation crashes when Roles is selected admin/ui
fix#53467 Flaky Admin UI E2E: 'should add OIDC mapper of type Attribute Importer' times out waiting for navigation ci
fix#53471 Regression with Trust Email when the userinfo endpoint is used identity-brokering
fix#53505 Broken link to FIPS documentation docs
fix#53567 Broken link to vault documentation in downstream docs
fix#53569 Fix broken link to migrating the database in downstream docs
fix#53571 Broken link in Operator Guide docs
fix#53624 Multiple link issues including incorrect names and upstream only coding docs
fix#53653 Flaky test: Admin UI E2E flows.spec.ts 'sets as default in action menu' fails on Firefox with strict mode violation admin/ui
+20 more items in the release notesfeatureIssue and verify digital wallet credentials with OID4VCI and OID4VP
featureAutomate user provisioning across identity systems with the SCIM API
featureRun multi-cluster deployments without an external cache using stateless mode (now supported)
featureSimpler administration with automatic index creation, reduced memory usage, and enhanced HTTP performance
featureToken exchange delegation for AI agents and automation with consent and FGAP authorization
securityQuickstart OID4VCI deployment - a playground for rapid prototyping with mdoc and SD-JWT credentials
securityOID4VCI Demo in Keycloak FAPI playground - available to show the details of the OID4VCI protocol messages exchanged between wallet and issuer, and to illustrate advanced concepts like proofs, attestation, credential refresh, and more.
security#50444 [CVE-2026-12388] IdP mapper admin role escalation identity-brokering
security#50618 [CVE-2026-14781] OIDC broker applies id_token email_verified to userinfo email, marking unverified addresses as verified oidc
security#51865 [CVE-2026-19608] Name-only group claims let same-name groups satisfy path-specific group policies authorization-services
security#52168 CVE-2026-54515 CVE-2026-59889 com.fasterxml.jackson.core:jackson-databind 2.22.0 dist/quarkus
security#52169 CVE-2026-59903 io.netty:netty-codec-http:4.1.136.Final dist/quarkus
feature#47295 LDAP bind credentials sent to new server when connection URL is changed ldap
deprecated#49239 Stop storing client private keys in the database and deprecate generate endpoints admin/rbac
feature#49784 UserInfo Endpoint: Add null-check for SignatureProvider when validating JWT bearer tokens oidc
feature#50469 Parameterized Scopes: First-match prefix resolution allows permissive scope to shadow stricter scope
feature#50520 OID4VCI: Unbounded expire parameter on /create-credential-offer allows indefinite pre-auth codes oid4vc
feature#50999 Same-second refresh-token rotation allows stale token replay oidc
feature#51211 SAML: Add signature verification for inbound LogoutResponse messages saml
security#51699 Missing security headers on root-path redirect when http-relative-path is configured dist/quarkus
feature#52058 Add warning about dynamic urls to reflect the danger of hostname pollution docs
security#52642 SCIM user deletion skips security-state cleanup
security#52645 Bulk HQL executeUpdate bypasses AsyncCommitIntegrator security classification
feature#52691 Token exchange provider routing allows delegation tokens to bypass actor validation via standard exchange token-exchange
security#52696 Recovered sites can enforce stale security configuration for up to one hour storage
deprecated#44062 Should Kerberos Credential delegation be deprecated?
deprecated#51921 Deprecate legacy OIDC client switches from 'OpenID Connect Compatibility Modes' oidc
deprecated#52121 Deprecate volatile sessions and allow opting out of session caching
deprecated#52923 Deprecate 'Full scope allowed' client switch oidc
deprecated#53219 Deprecate other client registration providers than OIDC
breaking#51897 Deprecate route from AUTH_SESSION_ID cookie for sticky sessions
breaking#52130 Deprecate clusterless feature
breaking#52480 EOL Keycloak Realm Operator
feature#16738 Supported client secret rotation
feature#48899 SSF: Add support for RiscAccountPurged event ssf
feature#50644 [OID4VP] Support direct_post.jwt (encrypted) response mode authentication
feature#50876 update admin client tests to use sort and filter
feature#16947 group.spec.ts does not contain example of how to add attributes while creating groups admin/client-js
feature#22524 Improve WebAuthn error messages translations
security#52676 CVE-2026-4633 User enumeration via identity-first login when Organizations feature is enabled organizations
+331 more items in the release notessecurity#50996 [CVE-2026-16103] Incomplete fix for CVE-2026-9798 (Keycloak CIBA brute-force lockout bypass at token redemption) oidc
security#51278 [CVE-2026-18206] Client policy source-host wildcard domains match non-subdomain suffixes oidc
security#51280 [CVE-2026-18203] Group policy child-extension matches sibling group path prefixes authorization-services
security#51281 [CVE-2026-18207] Source-group condition matches duplicate group names and can skip negative-logic enforcement oidc
security#51284 [CVE-2026-18208] Inactive out-of-audience introspection responses can include a signed JWT claim oidc
security#51285 [CVE-2026-18211] Secure-client-uris localhost exception accepts localhost-prefixed attacker domains oidc
security#51781 [CVE-2026-18217] SAML Redirect Binding Parameter Pollution saml
security#52531 CVE-2025-66021 com.googlecode.owasp-java-html-sanitizer:owasp-java-html-sanitizer dependencies
security#52692 [CVE-2026-89298] Confidential client secret disclosed to view-clients role via Client Registration GET oidc
security#52783 [CVE-2026-88770] Device Authorization Grant issues tokens to brute-force-locked accounts (sibling of CVE-2026-9798) oidc
security#52888 CVE-2026-84939 org.freemarker:freemarker
security#52972 CVE-2026-8798 org.bouncycastle:bc-fips dependencies
security#52974 CVE-2026-13505 org.bouncycastle:bc-fips dependencies
security#53074 [CVE-2026-93999] Keycloak 26.7.2: token-exchange refresh continues issuing tokens for a disabled audience client token-exchange
feature#51340 DCR: Registration access token allows protocol switch from OIDC to SAML oidc
feature#52357 Upgrade to Quarkus 3.33.4 dist/quarkus
fix#50739 keycloak 26.7.0 sha1 file is missing dist/quarkus
fix#50903 Missing input length validation on username field causes outsized log generation in /login-actions/authenticate authentication
fix#51065 Flaky test: org.keycloak.testsuite.oauth.ClientAuthPostMethodTest#testPostAuthenticationNotAllowedWhenBasicRequested ci
fix#51067 Flaky test: org.keycloak.testsuite.oauth.ClientAuthPostMethodTest#testBasicAuthenticationNotAllowedWhenPostRequested ci
fix#51304 Upgrade to 26.7.0 crashes under several tested scenarios. LazyInitializationException on non-deterministic getRealmsStream() order after DB dump/restore. infinispan
fix#51761 PAR request URI lifespan is used as a hard cap on interactive login duration oidc
fix#51778 [quarkus-next] BouncyCastle 1.85 breaks SAML client creation when client ID exceeds 64 characters dist/quarkus
fix#52033 Improve retrieval of large read-only resources via admin API storage
fix#52088 New Infinispan node joining the cluster becomes a command target/coordinator before its cache components are ready - ISPN000136 failures during Keycloak rolling restarts infinispan
fix#52153 DEBUG logging breaks persistent client session locking storage
fix#52193 Identity Provider Mappers - organization group targets do not resolve organizations
fix#52257 Event listeners receive the wrong event type when an EventBuilder is reused (e.g. FEDERATED_IDENTITY_LINK is logged and emailed as LOGIN) core
fix#52309 Admin Permissions filtering is applied to organization lookups during end-user authentication organizations
fix#52327 surefire-junit-platform not cached, causing intermittent test failures in CI ci
fix#52329 Flaky test: FlowTest.testRemoveExecutionSubflow fails with stale DELETE admin event testsuite
fix#52331 Flaky SCIM FilterTest.testFilterGroupsByMetaTimestamps due to same-millisecond timing saml
fix#52415 Flaky test: WebAuthnTransportLocaleTest.localizationTransportInternal fails with "Cannot logout user" testsuite
fix#52423 Flaky test: MySQLDistTest fails with "process hasn't exited" on slow CI runners testsuite
fix#52428 Flaky test: AttackDetectionResourceTest due to DefaultBlockingBruteForceProtector concurrent login blocking authentication
fix#52433 Flaky test: registration-policies.spec.ts kebab menu "Delete" item not found after toggle click testsuite
fix#52435 Flaky test: timeout.spec.ts fails with "fetch failed" due to server not ready and hardcoded port testsuite
fix#52460 Remove azure-cli version pin after runner image update removes apt source ci
fix#52487 Managing Identity Providers in the admin UI now requires client roles in the realm admin/ui
fix#52490 Flaky Admin UI E2E test: "Should show items on next page" in scope.spec.ts ci
+7 more items in the release notessecurity#52834 [CVE-2026-90997] Default MySQL/MariaDB row counts make stateless replay gates accept reused artifacts
security#52835 [CVE-2026-79651] Keycloak Unauthenticated Denial of Service via Unbounded Locale Caching
security#52836 [CVE-2026-74909] Incomplete fix: percent-encoded semicolon bypasses matrix parameter stripping in PathMatcher
security#52837 [CVE-2026-19607] Username Takeover Leading to Account Lockout
security#52838 [CVE-2026-17526] Privilege escalation: the "impersonation" role can impersonate a realm administrator
security#52839 [CVE-2026-18212] SAML Redirect DEFLATE helpers leak native zlib state
feature#52354 Upgrade to Quarkus 3.33.3.2 dist/quarkus
fix#49635 Performance issue with 26.6.2 dist/quarkus
fix#51102 Flaky test: org.keycloak.testsuite.oauth.AccessTokenTest#accessTokenRequest ci
fix#52015 New links errors for https://quarkus.io/guides docs
fix#52172 Cached `RealmAdapter.isUserManagedAccessAllowed()` returns `isEnabled()` infinispan
fix#52173 `realm_client` is computed into a client's attributes and then persisted on save admin/api
fix#52233 Oracle 19 full client OCI driver crashes on startup since 26.6.0 — SQLFeatureNotSupportedException on setNetworkTimeout dist/quarkus
fix#52241 Clicking on a sub group in the admin console throws an exception admin/ui
fix#52283 Flaky test SessionRestServiceTest.testGetDevicesSessions testsuite
fix#52430 Flaky test: userprofile.spec.ts fails with timeout on "no-users-found-empty-action" in serial suite testsuite