{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105867","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-05T23:06:29.748Z","datePublished":"2026-10-06T16:49:12.532Z","dateUpdated":"2026-10-06T17:24:39.913Z"},"containers":{"cna":{"title":"Payload: Client uploads could overwrite S3 objects","problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/payloadcms/payload/security/advisories/GHSA-7vg8-29qx-jgj8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/payloadcms/payload/security/advisories/GHSA-7vg8-29qx-jgj8"},{"name":"https://github.com/payloadcms/payload/commit/2df8238fbf17edfce335c399b90bf524ba9906a2","tags":["x_refsource_MISC"],"url":"https://github.com/payloadcms/payload/commit/2df8238fbf17edfce335c399b90bf524ba9906a2"},{"name":"https://github.com/payloadcms/payload/releases/tag/v3.90.0","tags":["x_refsource_MISC"],"url":"https://github.com/payloadcms/payload/releases/tag/v3.90.0"}],"affected":[{"vendor":"payloadcms","product":"payload","versions":[{"version":"< 3.90.0","status":"affected"},{"version":">= 4.0.0-canary.0, < 4.0.0-canary.34","status":"affected"}]},{"vendor":"@payloadcms","product":"storage-s3","versions":[{"version":"< 3.90.0","status":"affected"},{"version":">= 4.0.0-canary.0, < 4.0.0-canary.34","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-06T16:49:12.532Z"},"descriptions":[{"lang":"en","value":"Payload is a free and open source headless content management system. In @payloadcms/storage-s3 versions before 3.90.0 and canary versions before 4.0.0-canary.34, an authenticated user can overwrite an existing S3 object belonging to another upload collection when client uploads are enabled for multiple collections sharing a bucket and useCompositePrefixes is false or unset. This bypasses the target collection's access controls and prior file validation. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34."}],"source":{"advisory":"GHSA-7vg8-29qx-jgj8","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-06T17:24:30.442506Z","id":"CVE-2026-105867","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":"2026-10-06T17:24:39.913Z"}}]}}