PT-2026-55165 · Maven · Org.Keycloak:Keycloak-Services

Published 2026-05-27 · Updated 2026-05-27

OSV

CVSS v3.1

4.2

Medium

Base vector

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

A flaw was found in Keycloak, an open-source identity and access management solution. When a client application is configured to accept broad redirect Uniform Resource Identifiers (URIs), a remote attacker can manipulate the authentication process by crafting a special web address. If a user clicks this link, the client application might incorrectly prioritize attacker-controlled information over legitimate data. This vulnerability, known as HTTP parameter pollution, could allow an attacker to bypass security measures or gain unauthorized access to resources.

Fix

Weakness Enumeration

CWE-1288

Related Identifiers

GHSA-WCVJ-VPVW-9RR5

Affected Products

Org.Keycloak:Keycloak-Services

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-9689 · Security Note
• https://osv.dev/vulnerability/GHSA-wcvj-vpvw-9rr5 · Vendor Advisory
• https://github.com/keycloak/keycloak/issues/49430 · Note
• https://github.com/keycloak/keycloak/commit/1f58a4b79a258bcf2ef86b58fbf0016cdb91291f · Note
• https://github.com/keycloak/keycloak/commit/267a1a33d4dc1eac7622614ba9772b4e1e35726f · Note
• https://github.com/keycloak/keycloak/pull/49959 · Note
• https://github.com/keycloak/keycloak/commit/18832bcae5bebd5a1d66c2ec5fcd640e576fa625 · Note
• https://github.com/keycloak/keycloak · Note
• https://access.redhat.com/security/cve/CVE-2026-9689 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2481845 · Note