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7.5 High

CVE-2026-7307 A flaw was found in Keycloak

Description

A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server becomes unavailable.

Affected products and versions

Product Affected versions Fixed in
Red Hat Build of Keycloak Versions not published
Red Hat build of Keycloak 26.2.16 Versions not published
Red Hat build of Keycloak 26.4 26.4 earliest → < 26.4-17 26.4-17
Red Hat build of Keycloak 26.2 26.2 earliest → < 26.2-21 26.2-21
Red Hat build of Keycloak 26.4.12 Versions not published
Red Hat Single Sign-On 7 Versions not published
Red Hat Single Sign-On 7.6.13 Versions not published
RHEL-8 based Middleware Containers 7.6 earliest → < 7.6-85 7.6-85
Red Hat Single Sign-On 7.6 for RHEL 8 Versions not published
Show the 2 other branches
Product Affected versions Fixed in
Red Hat Single Sign-On 7.6 for RHEL 9 Versions not published
Red Hat Single Sign-On 7.6 for RHEL 7 Versions not published

References

Timeline

  1. Published
  2. Last modified

Other CVEs of Red Hat Build of Keycloak

The 276 CVEs of Red Hat Build of Keycloak →
CVE-2026-9797 Keycloak: keycloak: privilege escalation via client authentication manipulation by an authenticated administrator 6.5 Medium CVE-2026-97848 Keycloak-services: keycloak-services: protocol mapper with jsontype=json bypasses token sanitization 6.5 Medium CVE-2026-97367 Keycloak-services: keycloak-services: dcr azp and sid claim substitution allows account rest session takeover 6.4 Medium CVE-2026-96547 Keycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.roles 6.5 Medium
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