CVE-2025-14822 - CVE House
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Status published Low CVE-2025-14822

DoS from quadratic complexity in model.ParseHashtags

Vulnerability 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

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • CatenaCyber

References

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Affected Vendor

Affected Software

Mattermost
Vulnerable Versions:
10.11.0, 11.2.0, 10.11.9

Timeline

Official Publish: January 16th, 2026
Last Modified: January 16th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

CWE-407

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.