Medium severity4.3NVD Advisory· Published Sep 14, 2026
CVE-2026-86349
CVE-2026-86349
Description
Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.8, 10.11.x <= 10.11.22 fail to limit the nesting depth in the server-side Markdown parser which allows an authenticated attacker to cause a denial of service (CPU resource exhaustion) via a crafted post containing deeply nested blockquotes or list items.. Mattermost Advisory ID: MMSA-2026-00707
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <=11.9.0, <=11.8.4, <=11.7.8, <=10.11.22
Patches
Vulnerability mechanics
References
1News mentions
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