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Red Hat Security Advisory

RHSA-2026:95760

Red Hat build of Keycloak 26.4.17 Images Security Update

Released 2026-11-06 · Red Hat rating Important · View on Red Hat →

Fixed in

Fixes 38 records

Priority MEDIUM 51

jackson-databind validates the outer class of a class-name type ID but accepts attacker-selected classes inside its generic arguments, even when those classes violate the declared type or would be rejected as direct type…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.01196 Published 2026-10-28 Partial fix · 2.18.12, 2.21.8 +3 CWE-502
Priority MEDIUM 44

In Bouncy Castle for Java before 1.85, Lazy ASN.1 sequence forcing resets nesting-depth guard.

CVSS 4.0HIGH 8.7 Network No auth No interaction EPSS 0.00493 Published 2026-08-03 Partial fix · 1.85, 2.73.12 +3 CWE-674
Priority LOW 34

A flaw was found in the Keycloak Admin CLI kcadm tool, which is used by administrators to manage Keycloak servers from the command line.

CVSS 3.1HIGH 8.0 Network No auth User interaction EPSS 0.0022 Published 2026-11-05 Partial fix · 26.4.17-2, 26.4-29 +3 CWE-295
Priority LOW 34

A flaw was found in the SAML 1.1 assertion parser of Keycloak, a tool used for identity and access management.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00655 Published 2026-11-05 Fixed in 26.4.17-2, 26.4-29 +3 CWE-835
Priority LOW 34

A flaw was found in the SAML 1.1 XML parsing logic of Keycloak, an open-source identity and access management solution.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00734 Published 2026-11-05 Fixed in 26.4.17-2, 26.4-29 +3 CWE-835
Priority LOW 33

A flaw was found in the SAML identity broker component of Keycloak, which is used to delegate authentication to external identity providers.

CVSS 3.1HIGH 7.4 Network No auth No interaction EPSS 0.00412 Published 2026-11-05 Partial fix · 26.4.17-2, 26.4-29 +3 CWE-287
Priority LOW 31

A flaw was found in the protocol mapper and identity resolution components of Keycloak.

CVSS 3.1HIGH 7.1 Network Low privileges No interaction EPSS 0.00315 Published 2026-11-05 Fixed in 26.4.17-2, 26.4-29 +3 CWE-287
Priority LOW 29

A flaw was found in the token sanitization logic of Keycloak, an open source identity and access management solution.

CVSS 3.1MEDIUM 6.5 Network Low privileges No interaction EPSS 0.00338 Published 2026-11-06 Fixed in 26.4.17-2, 26.4-29 +3 CWE-20
Priority LOW 29

A flaw was found in the Dynamic Client Registration component of Keycloak, an open-source identity and access management solution.

CVSS 3.1MEDIUM 6.5 Network Low privileges No interaction EPSS 0.00302 Published 2026-11-06 Fixed in 26.4.17-2, 26.4-29 +3 CWE-862
Priority LOW 22

A flaw was found in the SAML protocol implementation of Keycloak, an open-source identity and access management solution.

CVSS 3.1MEDIUM 4.7 Network No auth User interaction EPSS 0.00523 Published 2026-07-31 Fixed in 26.4.17-2, 26.4-29 +3 CWE-20