{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-10080","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","state":"PUBLISHED","assignerShortName":"Mattermost","dateReserved":"2026-05-29T10:40:50.902Z","datePublished":"2026-08-17T22:04:30.830Z","dateUpdated":"2026-08-18T15:23:40.295Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"11.7.6","status":"affected","version":"11.7.0","versionType":"semver"},{"lessThanOrEqual":"10.11.21","status":"affected","version":"10.11.0","versionType":"semver"},{"lessThanOrEqual":"11.8.3","status":"affected","version":"11.8.0","versionType":"semver"},{"version":"11.9.0","status":"unaffected"},{"version":"11.7.7","status":"unaffected"},{"version":"10.11.22","status":"unaffected"},{"version":"11.8.4","status":"unaffected"}]}],"credits":[{"lang":"en","type":"finder","value":"alimursaliyev"}],"descriptions":[{"lang":"en","value":"Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fails to validate WebSocket command field types which allows an authenticated user to crash the plugin process and deny service to all Boards users via a custom_focalboard_SUBSCRIBE_TEAM message with a non-string teamId.. Mattermost Advisory ID: MMSA-2026-00687"}],"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":[{"lang":"en","type":"CWE","description":"CWE-704: Incorrect Type Conversion or Cast","cweId":"CWE-704"}]}],"references":[{"url":"https://mattermost.com/security-updates","name":"MMSA-2026-00687","tags":["vendor-advisory"]}],"solutions":[{"value":"Update Mattermost to versions 11.9.0, 11.7.7, 10.11.22, 11.8.4 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2026-00687","defect":["https://mattermost.atlassian.net/browse/MM-69047"],"discovery":"EXTERNAL"},"title":"Boards plugin panics on WebSocket command with non-string field types","providerMetadata":{"orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","shortName":"Mattermost","dateUpdated":"2026-08-17T22:04:30.830Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T15:23:33.901237Z","id":"CVE-2026-10080","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-18T15:23:40.295Z"}}]}}