Keycloak-services: keycloak: unauthorized access via improper validation of encrypted saml assertions (Red Hat Red Hat build of Keycloak 26.2)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.38 % · percentile 31 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
Description
A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language (SAML) broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. This allows the attacker to inject an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.
Weaknesses (CWE)
- CWE-1287 — Improper Validation of Specified Type of Input
References
- https://access.redhat.com/errata/RHSA-2026:3925
- https://access.redhat.com/errata/RHSA-2026:3926
- 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-2026-2092
- https://bugzilla.redhat.com/show_bug.cgi?id=2437296
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2092.json
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L | redhat |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L | redhat-SADP |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | HIGH 7.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-794g-x443-36f7 — Keycloak: Unauthorized access via improper validation of encrypted SAML assertions
European references
- ENISA EUVD · EUVD-2026-12688
- GCVE · GCVE-0-2026-2092
CERT-FR advisories
- CERTFR-2026-AVI-0669 — Vulnérabilité dans Keycloak · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*≥ 26.2 < 26.2.14cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*≥ 26.4 < 26.4.10
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat build of Keycloak 26.2 | unaffected 26.2.14-1 < * |
| Red Hat · Red Hat build of Keycloak 26.2 | unaffected 26.2-16 < * |
| Red Hat · Red Hat build of Keycloak 26.2 | unaffected 26.2-16 < * |
| Red Hat · Red Hat build of Keycloak 26.2.14 | |
| 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 |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| 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 |