Keycloak: keycloak: information disclosure due to redirect_uri validation bypass (Red Hat Red Hat build of Keycloak 26.2)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.45 % · percentile 39 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
Description
A flaw was found in Keycloak. This issue allows an attacker, who controls another path on the same web server, to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) that use a wildcard. A successful attack may lead to the theft of an access token, resulting in information disclosure.
Weaknesses (CWE)
- CWE-601 — URL Redirection to Untrusted Site
References
- https://access.redhat.com/errata/RHSA-2026:6475
- https://access.redhat.com/errata/RHSA-2026:6476
- https://access.redhat.com/errata/RHSA-2026:6477
- https://access.redhat.com/errata/RHSA-2026:6478
- https://access.redhat.com/security/cve/CVE-2026-3872
- https://bugzilla.redhat.com/show_bug.cgi?id=2445988
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3872.json
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N | redhat |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N | redhat-SADP |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-cjm2-j6cm-6p6m — Keycloak: Redirect URI validation bypass via ..;/ path traversal in OIDC auth endpoint
European references
- ENISA EUVD · EUVD-2026-18206
- GCVE · GCVE-0-2026-3872
Affected configurations (NVD CPE)
cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*cpe:2.3:a:redhat:build_of_keycloak:26.2:*:*:*:text-only:*:*:*cpe:2.3:a:redhat:build_of_keycloak:26.2.15:*:*:*:text-only:*:*:*cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:text-only:*:*:*cpe:2.3:a:redhat:build_of_keycloak:26.4.11:*:*:*:text-only:*:*:*
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat build of Keycloak 26.2 | unaffected 26.2.15-1 < * |
| Red Hat · Red Hat build of Keycloak 26.2 | unaffected 26.2-18 < * |
| Red Hat · Red Hat build of Keycloak 26.2 | unaffected 26.2-18 < * |
| Red Hat · Red Hat build of Keycloak 26.2.15 | |
| Red Hat · Red Hat build of Keycloak 26.4 | unaffected 26.4.11-1 < * |
| Red Hat · Red Hat build of Keycloak 26.4 | unaffected 26.4-14 < * |
| Red Hat · Red Hat build of Keycloak 26.4 | unaffected 26.4-14 < * |
| Red Hat · Red Hat build of Keycloak 26.4.11 |
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 |