Feed/CVE-2026-4646
CVE-2026-4646MEDIUMCVSS 4.3

Mattermost doesn't validate user-supplied input in API request handlers

Published May 26, 2026·Updated Jun 29, 2026

NVD Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate user-supplied input in API request handlers which allows an authenticated attacker to crash the plugin process via a crafted HTTP request to the PR details endpoint. Mattermost Advisory ID: MMSA-2026-00638

Affected Packages (2)

github.com/mattermost/mattermost-plugin-githubGO
Fixed in 1.0.1-0.20260330164815-c2840e980b3c
github.com/mattermost/mattermost-serverGO
Fixed in 11.6.1

CVSS Vector

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

References

View on NVD Search GitHub Search Google

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