CVE-2026-6689: mattermost server

csirt@kutim:~/threat-intel/cve/CVE-2026-6689

CVSS 4.3 · Medium EPSS 0,25%

Kerentanan Missing Authorization pada mattermost server. Skor CVSS 3.1 4.3 (Medium) menurut mattermost.com.

Deskripsi (NVD)

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/patch), which allows an authenticated user holding PermissionCreateTeam but not PermissionInviteUser on the resulting team to configure invite-controlled team settings (make the team publicly joinable via open invite and/or constrain membership via allowed domains) that they are not permitted to set on an existing team via POST /api/v4/teams with allow_open_invite: true and/or a non-empty allowed_domains in the request body.. Mattermost Advisory ID: MMSA-2026-00655

Rincian

Terbit di NVD: 12 Juni 2026
Terakhir diubah: 18 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 4.3 (Medium), sumber mattermost.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-862: Missing Authorization
EPSS (30 hari): 0,25% peluang dieksploitasi; lebih tinggi dari 15,7% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
mattermost	mattermost server	Versi 10.11.0 hingga sebelum 10.11.17
mattermost	mattermost server	Versi 11.5.0 hingga sebelum 11.5.5
mattermost	mattermost server	Versi 11.6.0 hingga sebelum 11.6.2

> 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.