{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-9699","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","state":"PUBLISHED","assignerShortName":"Mattermost","dateReserved":"2026-05-27T12:08:53.502Z","datePublished":"2026-06-26T14:43:51.702Z","dateUpdated":"2026-06-26T15:40:52.251Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"10.18.11","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"11.3.6","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"11.6.5","status":"affected","version":"0","versionType":"semver"},{"version":"11.7.0","status":"unaffected"},{"version":"10.11.19","status":"unaffected"},{"version":"11.6.4","status":"unaffected"},{"version":"11.5.7","status":"unaffected"}]}],"credits":[{"lang":"en","type":"finder","value":"Edgar Bellot Micó"}],"descriptions":[{"lang":"en","value":"Mattermost Plugins versions <=11.6 10.18.11 11.3.6 11.6.5.0 fail to sanitize error responses from the OpenAI API before logging, which allows a user with access to server logs or support packets to obtain a valid or partially reconstructable OpenAI API key via inspection of mattermost.log entries generated during authentication failures. Mattermost Advisory ID: MMSA-2026-00609"}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","baseSeverity":"MEDIUM","baseScore":6.8},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-532: Insertion of Sensitive Information into Log Files","cweId":"CWE-532"}]}],"references":[{"url":"https://mattermost.com/security-updates","name":"MMSA-2026-00609","tags":["vendor-advisory"]}],"solutions":[{"value":"Update Mattermost Plugins to versions 11.7.0, 10.11.19, 11.6.4, 11.5.7 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2026-00609","defect":["https://mattermost.atlassian.net/browse/MM-67547"],"discovery":"{\"self\"=>\"https://mattermost.atlassian.net/rest/api/2/customFieldOption/10557\", \"value\"=>\"Internal\", \"id\"=>\"10557\"}"},"title":"Mattermost Agents plugin logs unsanitized OpenAI API keys on authentication errors","providerMetadata":{"orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","shortName":"Mattermost","dateUpdated":"2026-06-26T14:43:51.702Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-26T15:40:45.502984Z","id":"CVE-2026-9699","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":"2026-06-26T15:40:52.251Z"}}]}}