CVE-2026-3872

high Red Hat
CVSS v3 Base Score
7.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Published: April 2, 2026 (42 days ago)
Last Modified: April 2, 2026
Vendor: Red Hat
Fix Available: ✓ Yes
Source: REDHAT

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.

CWE

CWE-601

Affected Products

Red Hat build of Keycloak 26.2Red Hat build of Keycloak 26.2.15Red Hat build of Keycloak 26.4Red Hat build of Keycloak 26.4.11

Fix Status

✅ Fix Available

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov