{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8075","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","state":"PUBLISHED","assignerShortName":"Mattermost","dateReserved":"2026-05-07T10:57:31.807Z","datePublished":"2026-07-17T10:05:06.211Z","dateUpdated":"2026-07-17T12:53:59.567Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"5.5.13","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.0.2","status":"affected","version":"0","versionType":"semver"},{"version":"6.3.0","status":"unaffected"},{"version":"5.13.6.0","status":"unaffected"},{"version":"6.2.1.0","status":"unaffected"}]}],"credits":[{"lang":"en","type":"finder","value":"Jopraveen"}],"descriptions":[{"lang":"en","value":"Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermost Advisory ID: MMSA-2026-00668"}],"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-754: Improper Check for Unusual or Exceptional Conditions","cweId":"CWE-754"}]}],"references":[{"url":"https://mattermost.com/security-updates","name":"MMSA-2026-00668","tags":["vendor-advisory"]}],"solutions":[{"value":"Update Mattermost Desktop App to versions 6.3.0, 5.13.6.0, 6.2.1.0 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2026-00668","defect":["https://mattermost.atlassian.net/browse/MM-68689"],"discovery":"EXTERNAL"},"title":"Posting a malicious markdown image crashes the Mattermost Desktop App","providerMetadata":{"orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","shortName":"Mattermost","dateUpdated":"2026-07-17T10:05:06.211Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-17T12:53:52.808122Z","id":"CVE-2026-8075","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":"2026-07-17T12:53:59.567Z"}}]}}