https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-09-30T23:37:32.019744+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/cve-2026-95666 CVE-2026-95666 — Unbounded post ID array in the bulk reactions endpoint allows denial of service 2026-09-30T23:37:32.022465+00:00

Affected: Mattermost

Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to limit the length of the post ID array accepted by the bulk reactions endpoint which allows an authenticated user to cause excessive database load via a crafted request to {{POST /api/v4/posts/ids/reactions}}.. Mattermost Advisory ID: MMSA-2026-00771