Riskcovery

CVE-2025-14822

DoS from quadratic complexity in model.ParseHashtags

State
Published
Severity
3.1 Low
Published
Jan 16, 2026
Updated
Jan 16, 2026
Reserved
Dec 17, 2025

Read the record on cve.org

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

Scores

CVSSScoreVectorSource
3.13.1 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:LMattermost

Weaknesses

  • CWE-407 Inefficient Algorithmic Complexity

Affected Products

ProductVersions
MattermostMattermost
  • 10.11.0 through 10.11.8Affected
  • 11.2.0Not affected
  • 10.11.9Not affected

References

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