CVE-2026-3590

medium

Mattermost versions 10.11.x

Vendor / product: Mattermost — mattermost server

Mattermost versions 10.11.x

CVSS

6.5

6.5 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (responsibledisclosure@mattermost.com)

Timeline (UTC)

Published: 2026-04-15 12:16

Modified: 2026-11-11 23:10

NVD status: Analyzed

Last synced 3 hours ago

Verified against the source API 2026-11-11 23:12 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

mattermost / mattermost_server ≥10.11.0 <10.11.13, ≥11.3.0 <11.3.3, ≥11.4.0 <11.4.3, ≥11.5.0 <11.5.1

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

NVD CVE API 2.0 — fetched 2026-11-11 23:12 UTC · record ↗