CVE-2026-18217

Katalog CVE

CVSS 4.7 · Medium EPSS 0,33%

Kerentanan Improper Input Validation pada redhat build of keycloak. Skor CVSS 3.1 4.7 (Medium) menurut NVD.

Deskripsi (NVD)

A flaw was found in the SAML protocol implementation of Keycloak, an open-source identity and access management solution. The issue occurs when Keycloak handles SAML authentication requests using the HTTP-Redirect binding. If a client is configured with a wildcard redirect URL, an attacker can craft a request that includes malicious parameters. When a user authenticates, Keycloak appends its legitimate response to the attacker's parameters. This can cause some service providers to process the attacker's data instead of the real login information, potentially leading to a user being logged into the wrong account.

Rincian

Terbit di NVD

31 Juli 2026

Terakhir diubah

7 Agustus 2026

Status NVD

Analyzed

CVSS 3.1

4.7 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation

EPSS (30 hari)

0,33% peluang dieksploitasi; lebih tinggi dari 24,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://access.redhat.com/security/cve/CVE-2026-18217 advisory vendor
• https://bugzilla.redhat.com/show_bug.cgi?id=2508311 issue tracking · advisory vendor