CVE-2026-3872

HIGH EPSS 34.4%

Published Apr 2, 20262mo ago · Modified Jun 17, 20261w ago

7.3 CVSS 3.1

High

Published Apr 2, 2026 2mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

7.3

Exploitability

2.1

Impact

5.2

Vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction Required

Scope Unchanged

Confidentiality High

Integrity High

Availability None

Threat Intelligence

EPSS Exploit Probability

34.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-601

Affected Products 5

Vendor	Product	Version	Range
redhat	build_of_keycloak	*	any
redhat	build_of_keycloak	26.2	any
redhat	build_of_keycloak	26.2.15	any
redhat	build_of_keycloak	26.4	any
redhat	build_of_keycloak	26.4.11	any

References 6

access.redhat.com https://access.redhat.com/errata/RHSA-2026:6475

Vendor Advisory
access.redhat.com https://access.redhat.com/errata/RHSA-2026:6476

Vendor Advisory
access.redhat.com https://access.redhat.com/errata/RHSA-2026:6477

Vendor Advisory
access.redhat.com https://access.redhat.com/errata/RHSA-2026:6478

Vendor Advisory
access.redhat.com https://access.redhat.com/security/cve/CVE-2026-3872

Vendor Advisory
bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2445988

Issue TrackingVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.