Medium severity4.3NVD Advisory· Published Sep 14, 2026· Updated Sep 14, 2026
CVE-2026-12882
CVE-2026-12882
Description
Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to parse Markdown autolinks with unmatched trailing closing parentheses in linear time, which allows an authenticated user with permission to create posts to cause excessive server CPU consumption and degrade availability for other users via specially crafted post or message attachment content. Mattermost Advisory ID: MMSA-2026-00703
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <=11.9.0, <=11.8.4, <=11.7.7, <=10.11.22
Patches
Vulnerability mechanics
References
1News mentions
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