CVE-2026-9689

4.2 MEDIUM

A flaw was found in Keycloak, an open-source identity and access management solution

Published: 2026-05-27 · Last updated: 2026-06-03

Severity and scoring

CVSS: 4.2 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
CWE: CWE-1288

Affected products

Vendor	Product
redhat	build_of_keycloak

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-9689
[Vendor advisory]https://access.redhat.com/security/cve/CVE-2026-9689
[Vendor advisory]https://bugzilla.redhat.com/show_bug.cgi?id=2481845

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