{"id":"CVE-2026-96260","title":"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 enforce a request body size limit during CSRF validation of plugin requests which allows an authenticated user to exhaust server memory…","summary":"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 enforce a request body size limit during CSRF validation of plugin requests which allows an authenticated user to exhaust server memory…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-789"],"vendor":"mattermost","product":"mattermost_server","affected":["mattermost_server >= 11.7.0, < 11.7.11","mattermost_server >= 11.8.0, < 11.8.6","mattermost_server >= 11.9.0, < 11.9.2","mattermost_server >= 11.10.0, < 11.10.2"],"patched":["mattermost_server 11.10.2"],"published":"2026-09-22","updated":"2026-10-07","sourceUpdated":"2026-10-07T16:37:42.773","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-96260","references":[{"url":"https://mattermost.com/security-updates","label":"responsibledisclosure@mattermost.com"}],"tags":["nvd","cve.org"],"epss":0.0042,"epssPercentile":0.36142,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-23T15:05:56.037132Z"},"ingestedAt":"2026-09-22T21:11:40.323Z","slug":"CVE-2026-96260","body":"## Overview\n\nMattermost 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 enforce a request body size limit during CSRF validation of plugin requests which allows an authenticated user to exhaust server memory and cause a denial of service via a large request body sent to a plugin endpoint.. Mattermost Advisory ID: MMSA-2026-00775\n\n## Affected\n\n- `mattermost_server >= 11.7.0, < 11.7.11`\n- `mattermost_server >= 11.8.0, < 11.8.6`\n- `mattermost_server >= 11.9.0, < 11.9.2`\n- `mattermost_server >= 11.10.0, < 11.10.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `mattermost_server 11.10.2`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}