CVE-2025-14822CWE-407

DoS from quadratic complexity in model.ParseHashtags

Low · published January 16, 2026

CVSS v3.1
3.1
EPSS
0%
Percentile
27.2
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
3.1 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00348 · 27.2th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2026-01-16T08:52Z
EPSS history
Timeline
  • 16 JAN 08:52Z
    DoS from quadratic complexity in model.ParseHashtags
    cvelistv5