PT-2026-29728 · Red Hat · Keycloak

Osidb Bzimport · Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-3872

Positive Technologies (AI Summary)

CVSS v3.1

7.3

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Keycloak (affected versions not specified)

Description A flaw exists in Keycloak that allows an attacker controlling another path on the same web server to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) using a wildcard. A successful attack could result in the theft of an access token, leading to information disclosure.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2026-3872

GHSA-CJM2-J6CM-6P6M

Affected Products

Keycloak

References · 12

• https://access.redhat.com/errata/RHSA-2026:6475 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:6477 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:6476 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2445988 · Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-3872 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-3872 · Security Note
• https://access.redhat.com/errata/RHSA-2026:6478 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-cjm2-j6cm-6p6m · Vendor Advisory
• https://github.com/keycloak/keycloak · Note
• https://github.com/keycloak/keycloak/commit/35a71b00bc856ac402711130f60190d3a24795e7 · Note
• https://github.com/keycloak/keycloak/issues/47718 · Note
• https://twitter.com/CVEnew/status/2039744362494546277 · Twitter Post