Keycloak: keycloak: denial of service due to excessive samlrequest decompression (Red Hat Red Hat build of Keycloak 26.4)
En bref
- Source
- NVD
- EPSS
- EPSS 0.65 % · centile 51 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- redhat
- Statut NVD
- Modified
Description
A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service (DoS) by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryError (OOM) and subsequent process termination. This vulnerability allows an attacker to disrupt the availability of the service.
Faiblesses (CWE)
- CWE-409 — Gestion incorrecte de données fortement compressées (bombe zip)
Références
- https://access.redhat.com/errata/RHSA-2026:3947
- https://access.redhat.com/errata/RHSA-2026:3948
- https://access.redhat.com/errata/RHSA-2026:76128
- https://access.redhat.com/errata/RHSA-2026:76129
- https://access.redhat.com/errata/RHSA-2026:76130
- https://access.redhat.com/errata/RHSA-2026:76132
- https://access.redhat.com/errata/RHSA-2026:76134
- https://access.redhat.com/security/cve/CVE-2026-2575
- https://bugzilla.redhat.com/show_bug.cgi?id=2440149
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:N/A:L | redhat |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD · secalert@redhat.com (Secondary) |
Avis
- GHSA-xv6h-r36f-3gp5 — Keycloak: Denial of Service due to excessive SAMLRequest decompression
Références européennes
- ENISA EUVD · EUVD-2026-12766
- GCVE · GCVE-0-2026-2575
Configurations affectées (CPE NVD)
cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*≥ 26.4 < 26.4.10
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 | |
| Red Hat · Red Hat Single Sign-On 7.6.13 | |
| Red Hat · Red Hat Single Sign-On 7.6 for RHEL 7 | unaffected 0:18.0.20-1.redhat_00001.1.el7sso < * |
| Red Hat · Red Hat Single Sign-On 7.6 for RHEL 8 | unaffected 0:18.0.20-1.redhat_00001.1.el8sso < * |
| Red Hat · Red Hat Single Sign-On 7.6 for RHEL 9 | unaffected 0:18.0.20-1.redhat_00001.1.el9sso < * |
| Red Hat · RHEL-8 based Middleware Containers | unaffected 7.6-85 < * |
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 |