{"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"}}]}}

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{"affected": [{"affectedData": [{"product": "payload", "vendor": "payloadcms", "versions": [{"status": "affected", "version": "< 3.90.0"}, {"status": "affected", "version": ">= 4.0.0-canary.0, < 4.0.0-canary.34"}]}, {"product": "storage-s3", "vendor": "@payloadcms", "versions": [{"status": "affected", "version": "< 3.90.0"}, {"status": "affected", "version": ">= 4.0.0-canary.0, < 4.0.0-canary.34"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-105867", "lastModified": "2026-10-06T18:16:50.187", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-105867", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-06T17:24:30.442506Z", "version": "2.0.3"}}]}, "published": "2026-10-06T17:17:23.137", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/payloadcms/payload/commit/2df8238fbf17edfce335c399b90bf524ba9906a2"}, {"source": "security-advisories@github.com", "url": "https://github.com/payloadcms/payload/releases/tag/v3.90.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/payloadcms/payload/security/advisories/GHSA-7vg8-29qx-jgj8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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