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CVE-2026-75587

ℹ️ low
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Summary

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

CVSS Score
3.6
Low
EPSS Score
0.1
Exploit Probability
Published Date
2026-08-17
First Seen: 2026-08-18
📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 3.9% of all 360,729 vulnerabilities in our database.

#346,739
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Aug 18, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Partial
Limited system impact
🏆 Discovered By
Juho Forsén
SSVC data provided by CISA
Last Modified 2026-08-19
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
CWE IDs (Weakness Types)
CWE-200

📦 Affected Products 1

Vendor Product Status Affected Versions
mattermost mattermost_desktop Affected
< 6.2.3

🔗 References 1

https://mattermost.com/security-updates
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-8075 🔶 medium 6.5 0.2 Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Matter... 2026-07-17
CVE-2026-9602 🔶 medium 6.5 0.2 Mattermost Desktop App versions <=6.2 6.0.2 5.6.13.0 fail to validate payloads sent from the Mattermost Web App to the D... 2026-07-17
CVE-2026-6517 🔶 medium 6.3 0.2 Mattermost Desktop App versions <=6.1 5.5.13.0 fail to restrict the allow list of domains to which NTLM credentials were... 2026-06-15
CVE-2026-8683 🔶 medium 6.5 0.2 Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Matterm... 2026-06-15
CVE-2026-3471 🔶 medium 6.5 0.0 Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent an invalid URL from loading in a pop-up window in t... 2026-05-18
CVE-2026-4643 ℹ️ low 3.5 0.0 Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying ... 2026-05-18
These CVEs affect the same products