CVE-2026-3872
Keycloak: keycloak: information disclosure due to redirect_uri validation bypass
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 7.3EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
02 Apr 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Affected products
Red Hat · Red Hat build of Keycloak 26.2Red Hat · Red Hat build of Keycloak 26.2.15Red Hat · Red Hat build of Keycloak 26.4Red Hat · Red Hat build of Keycloak 26.4.11Want to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://access.redhat.com/errata/RHSA-2026:6475https://access.redhat.com/errata/RHSA-2026:6476https://access.redhat.com/errata/RHSA-2026:6477https://access.redhat.com/errata/RHSA-2026:6478https://access.redhat.com/security/cve/CVE-2026-3872https://bugzilla.redhat.com/show_bug.cgi?id=2445988https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3872.json