{"id":"CVE-2026-44431","summary":"urllib3: Sensitive headers forwarded across origins in proxied low-level redirects","details":"urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.","aliases":["GHSA-qccp-gfcp-xxvc","PYSEC-2026-141"],"modified":"2026-05-23T18:30:00.552455141Z","published":"2026-05-13T15:20:24.588Z","related":["CGA-c7jq-4mq6-p587","SUSE-SU-2026:21728-1","SUSE-SU-2026:21741-1","openSUSE-SU-2026:10838-1"],"database_specific":{"cwe_ids":["CWE-200"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44431.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44431.json"},{"type":"ADVISORY","url":"https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44431"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/urllib3/urllib3","events":[{"introduced":"7c216f433e39e184b84cbfa49e41135a89e4baa0"},{"fixed":"9a950b92d999f906b6020bb2d1076ee56cddd5d2"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-44431.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}