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CVE-2026-86349

🗓️ 14 Sep 2026 13:51:30Reported by MendType 
mend
 mend
🔗 www.mend.io👁 8 Views

Authenticated DoS in Mattermost server-side Markdown parser via nested blockquotes or lists.

Related
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-86349
14 Sep 202614:47
–circl
cve
CVE
CVE-2026-86349
14 Sep 202613:51
–cve
cvelist
Cvelist
CVE-2026-86349 Mattermost Server Algorithmic DoS via Unbounded Markdown Block Nesting
14 Sep 202613:51
–cvelist
euvd
EUVD
EUVD-2026-77480
14 Sep 202613:51
–euvd
nvd
NVD
CVE-2026-86349
14 Sep 202614:17
–nvd
osv_mini
osv_mini
MINI-27GP-C6J5-M7MG
8 Oct 202620:47
–osv_mini
osv_mini
osv_mini
MINI-989R-GG9Q-MVXW
8 Oct 202620:47
–osv_mini
ptsecurity
Positive Technologies
PT-2026-91239
14 Sep 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-86349: Inefficient Algorithmic Complexity
14 Sep 202600:00
–rapid7
vulnrichment
Vulnrichment
CVE-2026-86349 Mattermost Server Algorithmic DoS via Unbounded Markdown Block Nesting
14 Sep 202613:51
–vulnrichment

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08 Oct 2026 00:08Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.14.3
CVSS 45.3
EPSS0.00367
SSVC
8