MEDIUMCVSS 5.4EPSS 0.3%

CVE-2026-13426

CVE-2026-13426 updated by NVD

Published: 2026-06-26
Modified: 2026-11-03
EPSS percentile: 22%
Sources: github-advisory, nvd

Summary

The Mattermost Go module github.com/mattermost/mattermost/server/public versions < v0.1.22 fail to validate path parameters when constructing API route paths which allows an attacker to redirect API calls to unintended endpoints via crafted IDs containing path traversal components. Mattermost Advisory ID: MMSA-2025-00532

Affected packages

Ecosystem	Package	Affected versions	Fixed versions
Go	github.com/mattermost/mattermost/server/public	—	0.1.22

Remediation: Upgrade to 0.1.22 or later.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-13426

Includes data from the GitHub Advisory Database, licensed under CC-BY 4.0.

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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EPSS scores provided by the FIRST.org Exploit Prediction Scoring System.