CVE-2026-75587

low

EUVD alias: EUVD-2026-60543

Assigned by CNA: mattermost

Published 2026-08-17 · Modified 2026-08-17

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CVSS v3

3.6

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

3.6

Description

Mattermost Desktop App versions <=6.2 6.2.2.0 fail to redact the pre-auth secret when generating a diagnostics report, which allows a local attacker with access to a user's diagnostics report or log files to obtain the plaintext pre-auth secret configured for a connected server via inspecting the Server Connectivity (Step-3) diagnostics output. Mattermost Advisory ID: MMSA-2026-00716

Predictions

Exploit likelihood

36%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

References

https://mattermost.com/security-updates

CWEs

CWE-200

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.