{"id":"CVE-2026-116516","title":"Insufficient length validation when parsing Zoom chat transcriptions","summary":"Mattermost versions <=11.9 11.1.9 11.5.8 11.10.7.0 fail to validate Zoom chat line length before slicing which allows an authenticated attacker to crash the Agents plugin via summarizing a Zoom chat transcription containing short continu…","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","cvssSource":"cna","cwe":["CWE-754"],"vendor":"Mattermost","product":"Mattermost","affected":["Mattermost >= <=11.9 11.1.9 11.5.8 11.10.7.0 <= <=11.9 11.1.9 11.5.8 11.10.7.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-26T14:54:35.705341Z"},"published":"2026-10-26","updated":"2026-10-26","sourceUpdated":"2026-10-26T15:35:50.283Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116516","references":[{"url":"https://mattermost.com/security-updates","label":"MMSA-2026-00723"}],"tags":["cve.org"],"ingestedAt":"2026-10-26T14:27:31.809Z","slug":"CVE-2026-116516","body":"## Overview\n\nMattermost versions <=11.9 11.1.9 11.5.8 11.10.7.0 fail to validate Zoom chat line length before slicing which allows an authenticated attacker to crash the Agents plugin via summarizing a Zoom chat transcription containing short continuation lines. Mattermost Advisory ID: MMSA-2026-00723\n\n## Affected\n\n- `Mattermost >= <=11.9 11.1.9 11.5.8 11.10.7.0 <= <=11.9 11.1.9 11.5.8 11.10.7.0`\n\n## Remediation\n\nUpdate Mattermost to versions 11.10.0, 11.9.2, 11.8.6, 11.7.11 or higher.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}