https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-10-19T03:56:02.908367+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/cve-2026-19621 CVE-2026-19621 — Mattermost leaks interactive-message integration secrets to non-admin users via post-deletion events and thread reads 2026-10-19T03:56:02.910552+00:00

Affected: Mattermost

Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to strip action integration secrets from post payloads before broadcasting post-deletion web socket events and returning thread API responses, which allows an authenticated channel member to obtain server-side webhook URLs and authentication context from interactive-message posts via the post_deleted websocket event or the threads REST API.. Mattermost Advisory ID: MMSA-2026-00766