CVE-2026-75587
Plaintext pre-auth secret exposure via Desktop App diagnostics report
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
INFO
Published Date :
Aug. 17, 2026, 10:09 p.m.
Last Modified :
Aug. 17, 2026, 10:09 p.m.
Remotely Exploit :
No
Source :
Mattermost
Affected Products
The following products are affected by CVE-2026-75587
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | 9302f53e-dde5-4bf3-b2f2-a83f91ac0eee |
Solution
- Update Mattermost Desktop App to version 6.2.3 or later.
- Ensure diagnostic reports do not contain sensitive information.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-75587 vulnerability anywhere in the article.