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CVE-2025-14435: Mattermost is vulnerable to DoS due to infinite re-renders on API errors

January 16, 2026 (updated February 27, 2026)

Mattermost versions 10.11.x <= 10.11.8, 11.1.x <= 11.1.1, 11.0.x <= 11.0.6 fail to prevent infinite re-renders on API errors which allows authenticated users to cause application-level DoS via triggering unbounded component re-render loops.

References

  • github.com/advisories/GHSA-mx8m-v8qm-xwr8
  • github.com/mattermost/mattermost
  • github.com/mattermost/mattermost/commit/613bb616cd62c584a606919e6978688e7b87d81e
  • github.com/mattermost/mattermost/commit/9f7629504bc93f79af8d606329c025a687e143cd
  • github.com/mattermost/mattermost/commit/cc6b77b271324796b72f1e6b82dba85a86462f9f
  • mattermost.com/security-updates
  • nvd.nist.gov/vuln/detail/CVE-2025-14435
  • pkg.go.dev/vuln/GO-2026-4326

Code Behaviors & Features

Detect and mitigate CVE-2025-14435 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions starting from 10.11.0 before 10.11.9, all versions starting from 11.0.0 before 11.0.7, all versions starting from 11.1.0 before 11.1.2

Fixed versions

  • 10.11.9
  • 11.1.2
  • 11.0.7

Solution

Upgrade to versions 10.11.9, 11.0.7, 11.1.2 or above.

Impact 6.8 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-770: Allocation of Resources Without Limits or Throttling

Source file

go/github.com/mattermost/mattermost-server/CVE-2025-14435.yml

Spotted a mistake? Edit the file on GitLab.

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