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Mattermost CVE-2025-14822

LOW
Inefficient Algorithmic Complexity (CWE-407)
2026-01-16 responsibledisclosure@mattermost.com GHSA-9r42-rhw3-2222
3.1
CVSS 3.1 · NVD

Severity by source

NVD PRIMARY
3.1 LOW
AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

3
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 16, 2026 - 09:16 nvd
LOW 3.1

DescriptionCVE.org

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

AnalysisAI

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 [CVSS 3.1 LOW]

Technical ContextAI

Affects Mattermost Server. 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

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

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CVE-2025-14822 vulnerability details – vuln.today

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