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Vendor Solution
Update Mattermost to versions 11.10.0, 11.9.1, 11.8.5, 11.7.9, 10.11.23 or higher.
Tracking
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No advisories yet.
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
Mon, 14 Sep 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
|
| Vendors & Products |
Mattermost
Mattermost mattermost |
|
| Metrics |
ssvc
|
Mon, 14 Sep 2026 14:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 | |
| Title | Mattermost Server Algorithmic DoS via Unbounded Markdown Block Nesting | |
| Weaknesses | CWE-407 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-09-14T19:23:01.455Z
Reserved: 2026-09-07T09:38:22.768Z
Link: CVE-2026-86349
Updated: 2026-09-14T19:15:30.809Z
Status : Received
Published: 2026-09-14T14:17:15.687
Modified: 2026-09-14T20:17:00.863
Link: CVE-2026-86349
No data.
OpenCVE Enrichment
Updated: 2026-09-14T20:00:08Z
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CWE-407
Inefficient Algorithmic Complexity