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CVE-2026-75587
Plaintext pre-auth secret exposure via Desktop App diagnostics report
Low3.6EPSS 0.13%
- Published
- Updated
- Reserved
- Assigned by
- Mattermost
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
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| MattermostCNA (assigner) | 3.1 | Low3.6 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | Low3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.6.
Weakness
Affected products
- affected ≤ 6.2.2
- unaffected 6.3.0
- unaffected 6.2.3.0
What to do
Solution: Update Mattermost Desktop App to versions 6.3.0, 6.2.3.0 or higher.
References (1)
- MMSA-2026-00716 (opens in a new tab)vendor-advisory
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-75587)Record last updated .