GitHub Advisoryadvisory · Maven
GHSA-p5mv-gj8j-xqgf Keycloak: Denial of Service via specially crafted SAML input
HIGH
Official page ↗
- Aliases
- CVE-2026-7307
- Ecosystem
- Maven
- Packages
- org.keycloak:keycloak-saml-core
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-1286
- Reviewed
- 2026-06-04
Affected packages
• Maven org.keycloak:keycloak-saml-core: < 26.6.2 → fixed in 26.6.2
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.
Related
Alias · CVE (1)
- CVE-2026-7307 A flaw was found in Keycloak. vulnerability
Weakness · CWE (1)
- CWE-1286 Improper Validation of Syntactic Correctness of Input weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-7307 advisory
- https://github.com/keycloak/keycloak/pull/49119 web
- https://github.com/keycloak/keycloak/commit/be84d28ce4c69c038d542f11405d5ede1d61f4a9 web
- https://access.redhat.com/errata/RHSA-2026:19594 web
- https://access.redhat.com/errata/RHSA-2026:19595 web
- https://access.redhat.com/errata/RHSA-2026:19596 web
- https://access.redhat.com/errata/RHSA-2026:19597 web
- https://access.redhat.com/security/cve/CVE-2026-7307 web
- https://bugzilla.redhat.com/show_bug.cgi?id=2476526 web
- https://github.com/keycloak/keycloak package
- https://github.com/keycloak/keycloak/releases/tag/26.6.2 web