CVE-2026-11800

Katalog CVE

CVSS 8.1 · High EPSS 0,30%

Kerentanan Improper Verification of Cryptographic Signature pada redhat build of keycloak. Skor CVSS 3.1 8.1 (High) menurut redhat.com.

Deskripsi (NVD)

A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an attacker with valid client credentials to bypass signature verification. By forging an assertion, the attacker can create unauthorized access tokens. This enables the attacker to impersonate any federated user linked to the affected Identity Provider, leading to unauthorized access and potential privilege escalation.

Rincian

Terbit di NVD

25 Juni 2026

Terakhir diubah

15 Juli 2026

Status NVD

Analyzed

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-347: Improper Verification of Cryptographic Signature

EPSS (30 hari)

0,30% peluang dieksploitasi; lebih tinggi dari 21,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://access.redhat.com/errata/RHSA-2026:30083 advisory vendor
• https://access.redhat.com/errata/RHSA-2026:30084 advisory vendor
• https://access.redhat.com/security/cve/CVE-2026-11800 advisory vendor
• https://bugzilla.redhat.com/show_bug.cgi?id=2487006 advisory vendor
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11800.json advisory vendor