CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 4.3. Exploitation may require the attacker to be authenticated. It may lead to a denial-of-service condition.
CVE
CVE-2026-6340
Severity
MEDIUM
CVSS
4.3
EPSS
0.24%
Original NVD Description
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted 7zip file with excessive folder declarations.. Mattermost Advisory ID: MMSA-2026-00573
Related CVEs
Other vulnerabilities affecting the same vendor(s)