{"id":"DEBIAN-CVE-2026-71191","details":"In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz-* headers are covered by the SigV4 signature on presigned URL requests. An attacker who obtains a presigned PUT URL can inject an unsigned X-Amz-Copy-Source header, causing Swift to perform a server-side copy from an arbitrary source object using the signer's authorization context. The attacker can read any object the signer has access to, provided the target project_id, container name, and object name are known. This affects all deployments using the default s3_acl=false configuration.","modified":"2026-10-01T03:03:31.224173333Z","published":"2026-08-05T06:16:40.180Z","upstream":["CVE-2026-71191"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-71191"}],"affected":[{"package":{"name":"swift","ecosystem":"Debian:12","purl":"pkg:deb/debian/swift?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.30.1-0+deb12u3"}]}],"versions":["2.30.0-4","2.30.1-0+deb12u1","2.30.1-0+deb12u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71191.json"}},{"package":{"name":"swift","ecosystem":"Debian:13","purl":"pkg:deb/debian/swift?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.35.1-0+deb13u3"}]}],"versions":["2.35.0-4","2.35.1-0+deb13u1","2.35.1-0+deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71191.json"}},{"package":{"name":"swift","ecosystem":"Debian:14","purl":"pkg:deb/debian/swift?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.37.1-6"}]}],"versions":["2.35.0-4","2.35.1-1","2.35.1-2","2.36.0-1","2.36.0-2","2.36.0-3","2.36.0-4","2.36.0-5","2.36.0-6","2.36.0-7","2.36.0-8","2.37.0-1","2.37.1-1","2.37.1-2","2.37.1-3","2.37.1-4","2.37.1-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71191.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/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"}]}