Keycloak: keycloak authorization header parsing leading to potential security control bypass (Red Hat Red Hat build of Keycloak 26.4)
En bref
- Source
- NVD
- EPSS
- EPSS 0.40 % · centile 35 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- redhat
- Statut NVD
- Deferred
Description
A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.
Faiblesses (CWE)
- CWE-551 — Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Références
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | redhat |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD · secalert@redhat.com (Secondary) |
Avis
- GHSA-gv94-wp4h-vv8p — Keycloak has Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Références européennes
- ENISA EUVD · EUVD-2026-1461
- GCVE · GCVE-0-2026-0707
Produits affectés
| Produit | Versions |
|---|---|
| Red Hat · Red Hat build of Keycloak 26.4 | unaffected 26.4.10-1 < * |
| Red Hat · Red Hat build of Keycloak 26.4 | unaffected 26.4-12 < * |
| Red Hat · Red Hat build of Keycloak 26.4 | unaffected 26.4-12 < * |
| Red Hat · Red Hat build of Keycloak 26.4.10 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |