VULNERABILITY INTELLIGENCE

CVE-2026-4858

CVSS score8 HIGH
EPSS probability0.33%
CISA KEVNot currently listed
Published2026-05-21
Last modified2026-07-23
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action URL.. Mattermost Advisory ID: MMSA-2026-00640

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-22

Primary references