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
redhat: build of keycloak
References10
- access.redhat.com/errata/RHSA-2026:19594 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:19595 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:19596 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:19597 Vendor Advisory
- access.redhat.com/security/cve/CVE-2026-7307 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2476526 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:19594 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:19595 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:19596 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:19597 Vendor Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 60 · as of 14 November 2026
- CWE
- CWE-1286
Could this be exploited in your environment?
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