CVEvulnerability

CVE-2026-10819

6.5 MEDIUM Published 2026-07-27 Modified 2026-08-03 Official page ↗
Status
Analyzed
Published
2026-07-27
Last modified
2026-08-03
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-409

Description

Mattermost versions 11.6.x <= 11.6.5, 10.11.x <= 10.11.20, 11.8.x <= 11.8.1, 11.7.x <= 11.7.4 fail to limit the number of frames and enforce the file size cap on animated GIF uploads, which allows an authenticated attacker to cause a denial of service via a crafted animated GIF uploaded as a custom emoji.. Mattermost Advisory ID: MMSA-2026-00695

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.21) • mattermost mattermost server (>= 11.6.0 < 11.6.6) • mattermost mattermost server (>= 11.7.0 < 11.7.5) • mattermost mattermost server (>= 11.8.0 < 11.8.2)

Related

Weakness · CWE (1)

  • CWE-409 Improper Handling of Highly Compressed Data (Data Amplification) weakness

References