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CVE-2026-4858

8.0 HIGH

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 trav...

Published: 2026-05-21 · Last updated: 2026-05-21

Severity and scoring

CVSS
8.0 HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
CWE
CWE-22

Affected products

VendorProduct
mattermostmattermost_server

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

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-6957 — Mattermost Plugins versions <=1.1.5 fail to sanitize filenames received from federated peers before using them to construct export destin... (8.0 HIGH)
  • CVE-2026-4915 — 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 filter nil elements from outgoing w... (6.5 MEDIUM)
  • CVE-2026-4055 — Mattermost versions 11.5.x <= 11.5.1 fail to validate team-level run_create permission against the target team when creating a playbook r... (4.3 MEDIUM)
  • CVE-2026-6347 — Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields in the Matter... (7.6 HIGH)
  • CVE-2026-6346 — Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields before includ... (8.7 HIGH)

Same CWE

  • CVE-2026-52726 — Dulwich is a pure-Python implementation of the Git file formats and protocols (7.5 HIGH)
  • CVE-2026-49219 — ImageMagick is free and open-source software used for editing and manipulating digital images (5.5 MEDIUM)
  • CVE-2026-47712 — Dulwich is a pure-Python implementation of the Git file formats and protocols (3.3 LOW)
  • CVE-2026-46703 — Boxlite is a sandbox service that allows users to create lightweight virtual machines (Boxes) and launch OCI containers within them to ru... (9.6 CRITICAL)
  • CVE-2026-42305 — Dulwich is a pure-Python implementation of the Git file formats and protocols (8.8 HIGH)