{"id":"CVE-2026-105867","revision":"c0f200ccac324867b3234c802e836c1e","records":[{"revision":"c0f200ccac324867b3234c802e836c1e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-105867","aliases":[],"title":"Payload: Client uploads could overwrite S3 objects","description":"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.","state":0,"publishedAt":"2026-10-06T16:49:12.532+00:00","modifiedAt":"2026-10-06T17:24:39.913+00:00","affected":[{"ecosystem":"Vendor product","name":"payload","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"payloadcms\",\n                    \"product\": \"payload\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.90.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.0.0-canary.0, < 4.0.0-canary.34\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"storage-s3","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"@payloadcms\",\n                    \"product\": \"storage-s3\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.90.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.0.0-canary.0, < 4.0.0-canary.34\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":7.1,"severity":"HIGH"}],"references":["https://github.com/payloadcms/payload/security/advisories/GHSA-7vg8-29qx-jgj8","https://github.com/payloadcms/payload/commit/2df8238fbf17edfce335c399b90bf524ba9906a2","https://github.com/payloadcms/payload/releases/tag/v3.90.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105867","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-105867","identifiers":["CVE-2026-105867"]},"retained":false,"historicalAffected":[]}],"coverage":[]}