mattermost/mattermost · Security
Mattermost is vulnerable to CPU exhaustion via crafted HTTP request
- GHSA ID
- GHSA-9r42-rhw3-2222
- CVE ID
- CVE-2025-14822
- Severity
- low
- Published
- Updated
- CVSS
- 3.1 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
- CVSS v3
- 3.1 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Description
Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens.
CWEs
- CWE-407 · Inefficient Algorithmic Complexity
- CWE-770 · Allocation of Resources Without Limits or Throttling
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-14822 ↗
- https://mattermost.com/security-updates ↗
- https://github.com/mattermost/mattermost/commit/4d86263f5430d0eb991fc52ec886cf778cb072e6 ↗
- https://github.com/mattermost/mattermost/commit/b3d6c0c564c1a79e54e5105d0a8b60fc58a2bdee ↗
- https://pkg.go.dev/vuln/GO-2026-4325 ↗
- https://github.com/advisories/GHSA-9r42-rhw3-2222 ↗