CVE-2025-14822 — DoS from quadratic complexity in model.ParseHashtags
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 r…
Published: 2026-01-16 · CVSS: 3.1 · CVSS 3.1
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
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7