CVE-2026-4636

Katalog CVE

CVSS 8.1 · High EPSS 0,48%

Kerentanan Incorrect Behavior Order: Authorization Before Parsing and Canonicalization pada redhat build of keycloak. Skor CVSS 3.1 8.1 (High) menurut redhat.com.

Deskripsi (NVD)

A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.

Rincian

Terbit di NVD

2 April 2026

Terakhir diubah

15 Juli 2026

Status NVD

Modified

CVSS 3.1

8.1 (High), sumber redhat.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

EPSS (30 hari)

0,48% peluang dieksploitasi; lebih tinggi dari 39,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://access.redhat.com/errata/RHSA-2026:6475 advisory vendor
• https://access.redhat.com/errata/RHSA-2026:6476 advisory vendor
• https://access.redhat.com/errata/RHSA-2026:6477 advisory vendor
• https://access.redhat.com/errata/RHSA-2026:6478 advisory vendor
• https://access.redhat.com/security/cve/CVE-2026-4636 advisory vendor
• https://bugzilla.redhat.com/show_bug.cgi?id=2450251 exploit · issue tracking · advisory vendor
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4636.json