{"id":"CVE-2026-116516","state":"PUBLISHED","title":"Insufficient length validation when parsing Zoom chat transcriptions","description":"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 continuation lines. Mattermost Advisory ID: MMSA-2026-00723","publishedAt":"2026-10-26T13:56:57.973Z","updatedAt":"2026-10-26T15:35:50.283Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"Mattermost"},"assigner":"Mattermost","products":["Mattermost Mattermost"],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"<=11.9 11.1.9 11.5.8 11.10.7.0","status":"affected","lessThanOrEqual":"<=11.9 11.1.9 11.5.8 11.10.7.0","versionType":"semver"},{"version":"11.10.0","status":"unaffected"},{"version":"11.9.2","status":"unaffected"},{"version":"11.8.6","status":"unaffected"},{"version":"11.7.11","status":"unaffected"}]}],"references":["https://mattermost.com/security-updates"],"weaknesses":["CWE-754"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/116xxx/CVE-2026-116516.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116516","state":"PUBLISHED","datePublished":"2026-10-26T13:56:57.973Z","dateUpdated":"2026-10-26T15:35:50.283Z","assignerShortName":"Mattermost","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateReserved":"2026-10-26T13:52:45.402Z"},"containers":{"cna":{"title":"Insufficient length validation when parsing Zoom chat transcriptions","descriptions":[{"lang":"en","value":"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 continuation lines. Mattermost Advisory ID: MMSA-2026-00723"}],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"<=11.9 11.1.9 11.5.8 11.10.7.0","status":"affected","lessThanOrEqual":"<=11.9 11.1.9 11.5.8 11.10.7.0","versionType":"semver"},{"version":"11.10.0","status":"unaffected"},{"version":"11.9.2","status":"unaffected"},{"version":"11.8.6","status":"unaffected"},{"version":"11.7.11","status":"unaffected"}]}],"references":[{"url":"https://mattermost.com/security-updates","name":"MMSA-2026-00723","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseSeverity":"MEDIUM","baseScore":6.5},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-754","lang":"en","type":"CWE","description":"CWE-754: Improper Check for Unusual or Exceptional Conditions"}]}],"providerMetadata":{"shortName":"Mattermost","orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateUpdated":"2026-10-26T13:56:57.973Z"},"credits":[{"lang":"en","type":"finder","value":"alimursaliyev"}],"solutions":[{"value":"Update Mattermost to versions 11.10.0, 11.9.2, 11.8.6, 11.7.11 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2026-00723","defect":["https://mattermost.atlassian.net/browse/MM-69780"],"discovery":"EXTERNAL"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-116516","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-26T14:54:35.705341Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-26T15:35:50.283Z"}}]}}}