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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.
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[{"vendor":"Red Hat","product":"Red Hat build of Keycloak 26.2","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhbk/keycloak-operator-bundle","cpes":["cpe:/a:redhat:build_keycloak:26.2::el9"],"versions":[{"version":"26.2.15-1","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat build of Keycloak 26.2","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhbk/keycloak-rhel9","cpes":["cpe:/a:redhat:build_keycloak:26.2::el9"],"versions":[{"version":"26.2-18","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat build of Keycloak 26.2","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhbk/keycloak-rhel9-operator","cpes":["cpe:/a:redhat:build_keycloak:26.2::el9"],"versions":[{"version":"26.2-18","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat build of Keycloak 26.2.15","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhbk/keycloak-rhel9","cpes":["cpe:/a:redhat:build_keycloak:26.2::el9"]},{"vendor":"Red Hat","product":"Red Hat build of Keycloak 26.4","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhbk/keycloak-operator-bundle","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"versions":[{"version":"26.4.11-1","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat build of Keycloak 26.4","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"rhbk/keycloak-rhel9","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"versions":[{"version":"26.4-14","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat build of Keycloak 26.4","defaultStatus"
Initial Analysis by NIST4/16/2026 4:52:42 PM
Action
Type
Old Value
New Value
Added
CPE Configuration
OR
*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:*:*:*
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:6475 Types: Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:6476 Types: Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:6477 Types: Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:6478 Types: Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-3872 Types: Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2445988 Types: Issue Tracking, Vendor Advisory
CVE Modified by Red Hat, Inc.4/02/2026 1:16:28 PM
Action
Type
Old Value
New Value
Added
Reference
https://access.redhat.com/errata/RHSA-2026:6475
Added
Reference
https://access.redhat.com/errata/RHSA-2026:6476
CVE Modified by Red Hat, Inc.4/02/2026 10:16:32 AM
Action
Type
Old Value
New Value
Added
Reference
https://access.redhat.com/errata/RHSA-2026:6477
Added
Reference
https://access.redhat.com/errata/RHSA-2026:6478
New CVE Received from Red Hat, Inc.4/02/2026 9:16:26 AM
Action
Type
Old Value
New Value
Added
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.
) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
