Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U L N N 3.3 .0013 2.4 —
AFFECTED Product Versions Fixed Mattermost unspecified 6.3.0
TIMELINE Aug 17 Reserved by Mattermost Aug 17 Published (CNA: Mattermost) Aug 19 RESCORED — CVE-2026-75587 (Mattermost). CVSS 3.6 → 3.3 (NVD).
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
| Date | Event | Detail |
|---|---|---|
| August 17, 2026 | Reserved | Reserved by Mattermost |
| August 17, 2026 | Published | Published (CNA: Mattermost) |
| August 19, 2026 | RESCORED | RESCORED — CVE-2026-75587 (Mattermost). CVSS 3.6 → 3.3 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Mattermost | Mattermost | — | — | 6.3.0 |
Authoritative record: CVE-2026-75587 at cve.org
Vendors: mattermost
Weaknesses: CWE-200
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-75587 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
