CVE-2026-19600
CVE-2026-19600 · Mattermost logs plaintext authentication tokens in debug-level server logs on failed auth attempts
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to sanitize authentication tokens before writing them to server log entries, which allows an attacker with access to server logs to obtain valid session tokens or OAuth access tokens and impersonate authenticated users via the debug-level Mattermost server log.. Mattermost Advisory ID: MMSA-2026-00763
CVSS 4.5 · Medium · EPSS 0.2%
- Published
- Updated
Affected products and versions
mattermost
- Versions
- ≥ 11.9.0, ≤ 11.9.1: Affected (semver)
- ≥ 11.8.0, ≤ 11.8.5: Affected (semver)
- ≥ 11.7.0, ≤ 11.7.10: Affected (semver)
- ≥ 11.10.0, ≤ 11.10.1: Affected (semver)
- 11.11.0: Not affected
- 11.9.2: Not affected
- 11.8.6: Not affected
- 11.7.11: Not affected
- 11.10.2: Not affected
No fix published