CVE-2026-15754: mattermost server

csirt@kutim:~/threat-intel/cve/CVE-2026-15754

CVSS 4.2 · Medium EPSS 0,25%

Kerentanan Incorrect Authorization pada mattermost server. Skor CVSS 3.1 4.2 (Medium) menurut mattermost.com.

Deskripsi (NVD)

Mattermost versions 11.7.x <= 11.7.6, 11.8.x <= 11.8.3 The access control policy unassign endpoint fails to re-validate that each target channel still belongs to the requesting admin's team, which allows an authenticated team administrator to remove ABAC (attribute-based access control) policy assignments from channels outside their team via the policy unassign API after a channel has been moved to another team.. Mattermost Advisory ID: MMSA-2026-00718

Rincian

Terbit di NVD: 17 Agustus 2026
Terakhir diubah: 18 Agustus 2026
Status NVD: Analyzed
CVSS 3.1: 4.2 (Medium), sumber mattermost.com
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-863: Incorrect Authorization
EPSS (30 hari): 0,25% peluang dieksploitasi; lebih tinggi dari 14,6% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
mattermost	mattermost server	Versi 11.7.0 hingga sebelum 11.7.7
mattermost	mattermost server	Versi 11.8.0 hingga sebelum 11.8.4

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://mattermost.com/security-updates advisory vendor

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.