Service Disruption Vulnerability in Mattermost Plugins
CVE-2026-3116

4.9MEDIUM

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
26 March 2026

What is CVE-2026-3116?

Certain versions of Mattermost Plugins are vulnerable due to a failure to validate the size of incoming requests. This flaw enables authenticated attackers to exploit the webhook endpoint, potentially leading to a service disruption. Users are urged to review the security advisory for information on mitigating the effects of this vulnerability.

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Deploy the Patch

Affected Version(s)

Mattermost 0 <= 11.0.4

Mattermost 0 <= 11.1.3

Mattermost 0 <= 11.3.2

References

https://mattermost.com/security-updates
vendor-advisory

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

thecybertantrik
JSON
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