Most recent entries from all https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 28 Sep 2026 14:09:16 +0000 CVE-2026-4635 — Persistent notification timing attack causing server denial of service https://vulnerability.circl.lu/vuln/cve-2026-4635 <p><strong>Affected:</strong> Mattermost</p> <p>Mattermost versions 11.6.x &lt;= 11.6.0, 11.5.x &lt;= 11.5.3, 11.4.x &lt;= 11.4.4, 10.11.x &lt;= 10.11.14 fail to archive the channel before removing persistent notifications which allows authenticated user to crash the server via timing the creation of persistent notification message between the server deleting existing persistent notifications and archiving the channel.. Mattermost Advisory ID: MMSA-2026-00637</p> <p><strong>Affected:</strong> Mattermost</p> <p>Mattermost versions 11.6.x &lt;= 11.6.0, 11.5.x &lt;= 11.5.3, 11.4.x &lt;= 11.4.4, 10.11.x &lt;= 10.11.14 fail to archive the channel before removing persistent notifications which allows authenticated user to crash the server via timing the creation of persistent notification message between the server deleting existing persistent notifications and archiving the channel.. Mattermost Advisory ID: MMSA-2026-00637</p> https://vulnerability.circl.lu/vuln/cve-2026-4635