Disclosure summary
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.
Source-reported weakness categories
CWE-1286
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-7307
Open original source · Updated Oct 06, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| redhat | build_of_keycloak | * {"versionStartIncluding":"26.4","versionEndExcluding":"26.4.12"} |
Original records & references
- NIST NVD record
- CVE Program record
- access.redhat.com — Vendor Advisory
- access.redhat.com — Vendor Advisory
- access.redhat.com — Vendor Advisory
- access.redhat.com — Vendor Advisory
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com
- access.redhat.com — Vendor Advisory
- bugzilla.redhat.com — Vendor Advisory
- access.redhat.com — Vendor Advisory
- access.redhat.com — Vendor Advisory
- access.redhat.com — Vendor Advisory
- access.redhat.com — Vendor Advisory
- access.redhat.com — Vendor Advisory
- bugzilla.redhat.com — Vendor Advisory
- security.access.redhat.com
PUBLISHED 2026-05-19T08:16:19-04:00
MODIFIED 2026-10-06T13:17:26-04:00
INGESTED 2026-10-10T20:25:11-04:00