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P4Verified

CVE-2026-96259: mattermost server from 11.7.0 (inclusive), before 11.7.11 (exclusive), from 11.8.0 (inclusive), before 11.8.6…

CVE-2026-96259. CVSS 3.1 base score 5.5 (MEDIUM, Vendor/CNA). EPSS 0.00255 (percentile 0.15587), scored 2026-10-06.

Affected technology

mattermost server · from 11.7.0 (inclusive), before 11.7.11 (exclusive)
mattermost

mattermost server · from 11.8.0 (inclusive), before 11.8.6 (exclusive)
mattermost

mattermost server · from 11.9.0 (inclusive), before 11.9.2 (exclusive)
mattermost

mattermost server · from 11.10.0 (inclusive), before 11.10.2 (exclusive)
mattermost

Mattermost · 11.9.0 through 11.9.1, 11.8.0 through 11.8.5, 11.7.0 through 11.7.10, 11.10.0 through 11.10.1
Mattermost

Description’s affected range: versions 11.9.x <= 11.9.1

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · High privileges required · No user interaction required

What an attacker can do

Vendor/CNA’s CVSS 3.1 assessment (base score 5.5/10) rates confidentiality and integrity impact as low; availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.

Published

CWE
CWE-918
CCR priority
22.1 /100 (P4)
CVSS 3.1
5.5 /10 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N · Vendor/CNA
EPSS
0.00255 · percentile 0.15587 · 2026-10-06
KEV
no

Provenance

Stable permalink: https://cybercodered.org/item/cve-cve-2026-96259.html