{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3116","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","state":"PUBLISHED","assignerShortName":"Mattermost","dateReserved":"2026-02-24T11:10:17.757Z","datePublished":"2026-03-26T16:19:32.607Z","dateUpdated":"2026-03-26T17:51:14.971Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"11.0.4","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"11.1.3","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"11.3.2","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"10.11.11","status":"affected","version":"0","versionType":"semver"},{"version":"11.5.0","status":"unaffected"},{"version":"11.4.1","status":"unaffected"},{"version":"11.3.2","status":"unaffected"},{"version":"11.2.4","status":"unaffected"},{"version":"10.11.12","status":"unaffected"}]}],"credits":[{"lang":"en","type":"finder","value":"thecybertantrik"}],"descriptions":[{"lang":"en","value":"Mattermost Plugins versions <=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to validate incoming request size which allows an authenticated attacker to cause service disruption via the webhook endpoint. Mattermost Advisory ID: MMSA-2026-00589"}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","baseSeverity":"MEDIUM","baseScore":4.9},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-400 Uncontrolled Resource Consumption","cweId":"CWE-400"}]}],"references":[{"url":"https://mattermost.com/security-updates","name":"MMSA-2026-00589","tags":["vendor-advisory"]}],"solutions":[{"value":"Update Mattermost Plugins to versions 11.5.0, 11.4.1, 11.3.2, 11.2.4, 10.11.12 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2026-00589","defect":["https://mattermost.atlassian.net/browse/MM-67303"],"discovery":"EXTERNAL"},"title":"Improper Input Validation in Zoom Plugin Webhook Handler","providerMetadata":{"orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","shortName":"Mattermost","dateUpdated":"2026-03-26T16:19:32.607Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-3116","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-03-26T17:37:45.639766Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-26T17:51:14.971Z"}}]}}