Nixpkgs security tracker

Untriaged

Permalink CVE-2026-4858

8.0 HIGH

CVSS version (CVSS): 3.1
Attack Vector (AV): Network (N)
Attack Complexity (AC): High (H)
Privileges Required (PR): Low (L)
User Interaction (UI): Required (R)
Scope (S): Changed (C)
Confidentiality (C): High (H)
Integrity (I): High (H)
Availability (A): High (H)
Modified Attack Vector (MAV): Network (N)
Modified Attack Complexity (MAC): High (H)
Modified Privileges Required (MPR): Low (L)
Modified User Interaction (MUI): Required (R)
Modified Confidentiality (MC): High (H)
Modified Scope (MS): Changed (C)
Modified Integrity (MI): High (H)
Modified Availability (MA): High (H)

created 1 week, 4 days ago Activity log

Created suggestion 1 week, 4 days ago

Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.

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

References

MMSA-2026-00640 vendor-advisory

Affected products

Mattermost

=<11.4.4
=<10.11.14
=<11.6.0
==10.11.15
==11.6.1
=<11.5.3
==11.5.4
==11.7.0
==11.4.5

Matching in nixpkgs

pkgs.mattermost

Open source platform for secure collaboration across the entire software development lifecycle

nixos-unstable 11.6.1
- nixpkgs-unstable 11.6.1
- nixos-unstable-small 11.6.1
nixos-25.11 10.11.15
- nixos-25.11-small 10.11.15
- nixpkgs-25.11-darwin 10.11.15