{"id":"CVE-2026-97149","details":"In OpenStack Swift before 2.38.2, the tempurl middleware does not reject the X-Copy-From header on PUT requests. A TempURL signature only covers the method, expiry, and path, and thus the list of disallowed headers is the only defense against a signed PUT request changing what the request does. An attacker holding a PUT TempURL for a single object can add an X-Copy-From header naming any object in the same account; the copy middleware copies that object to the destination, and the attacker then reads the victim's data back with a GET TempURL for the destination object. Copies across account boundaries are rejected. Only deployments using the shipped default proxy pipeline (tempurl and copy middleware) with account-level TempURL keys are affected.","modified":"2026-09-28T11:45:14.797461303Z","published":"2026-09-24T02:25:49.093Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97149.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"2.4.0"},{"fixed":"2.35.5"},{"introduced":"2.36.0"},{"fixed":"2.36.4"},{"introduced":"2.37.0"},{"fixed":"2.37.4"}]}],"cna_assigner":"mitre","cwe_ids":["CWE-184"]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/09/24/5"},{"type":"WEB","url":"https://opendev.org/openstack/swift"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97149.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97149"},{"type":"REPORT","url":"https://launchpad.net/bugs/2166876"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://opendev.org/openstack/swift","events":[{"introduced":"9f5881d5143fd06a328bde2713cd9c61df579289"},{"fixed":"844252daed8d24ed6df016d1512e6a385ebb60aa"}],"database_specific":{"extracted_events":[{"introduced":"2.38.0"},{"fixed":"2.38.2"}],"source":"AFFECTED_FIELD"}}],"versions":["2.38.1","2.38.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97149.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}]}