CVE-2026-7307: Keycloak: Denial of Service via specially crafted SAML input
(updated )
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.
References
- access.redhat.com/errata/RHSA-2026:19594
- access.redhat.com/errata/RHSA-2026:19595
- access.redhat.com/errata/RHSA-2026:19596
- access.redhat.com/errata/RHSA-2026:19597
- access.redhat.com/security/cve/CVE-2026-7307
- bugzilla.redhat.com/show_bug.cgi?id=2476526
- github.com/advisories/GHSA-p5mv-gj8j-xqgf
- github.com/keycloak/keycloak/commit/be84d28ce4c69c038d542f11405d5ede1d61f4a9
- github.com/keycloak/keycloak/pull/49119
- github.com/keycloak/keycloak/releases/tag/26.6.2
- nvd.nist.gov/vuln/detail/CVE-2026-7307
Code Behaviors & Features
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