What is CVE-2026-107602?

CVE-2026-107602 is a high-severity vulnerability, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2026-11-05.

How severe is CVE-2026-107602?

High severity. CVSS v3 base score is 7.5 out of 10.

CVE-2026-107602

CVE-2026-107602

A flaw was found in the SAML 1.1 XML parsing logic of Keycloak, an open-source identity and access management solution. The issue occurs when the parser encounters unexpected elements within a security token's key information section, causing the processing thread to enter an infinite loop. An unauthenticated remote attacker could exploit this by sending specially crafted requests, leading to 100% CPU usage and a total denial of service that requires a server restart to resolve.

Published 2026-11-05 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

RHSA-2026:95759 (vendor-advisory)
RHSA-2026:95760 (vendor-advisory)
RHSA-2026:95761 (vendor-advisory)
RHSA-2026:95762 (vendor-advisory)
access.redhat.com/security/cve/CVE-2026-107602 (vdb-entry)
RHBZ#2547937 (issue-tracking)

Frequently asked questions

What is CVE-2026-107602?: CVE-2026-107602 is a high-severity vulnerability, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2026-11-05.
How severe is CVE-2026-107602?: High severity. CVSS v3 base score is 7.5 out of 10.