{"id":"CVE-2026-44503","summary":"Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect","details":"The RedirectHandler middleware in microsoft/kiota-java (com.microsoft.kiota:microsoft-kiota-http-okHttp v1.9.0) and other Kiota libraries fails to strip sensitive HTTP headers when following 3xx redirects to a different host or scheme. Only the Authorization header is removed; Cookie, Proxy-Authorization, and all custom headers are forwarded to the redirect target.","aliases":["GHSA-7j59-v9qr-6fq9"],"modified":"2026-05-18T06:00:24.521722187Z","published":"2026-05-14T15:58:57.772Z","related":["CGA-cg9g-rqh6-8qcp"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44503.json","cwe_ids":["CWE-601"],"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"1.22.0"},{"fixed":"1.5.5"},{"fixed":"1.0.0-preview.100"},{"fixed":"1.9.9"}]}],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44503.json"},{"type":"ADVISORY","url":"https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44503"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/microsoft/kiota-java","events":[{"introduced":"0"},{"fixed":"63b43ddad3136a2fac631153d6af8019b7d42138"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"1.9.1"}]}}],"versions":["v1.9.0","v1.8.12","v1.8.11","v1.8.10","v1.8.9","v1.8.8","v1.8.7","v1.8.6","v1.8.5","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.0","v1.6.0","v1.5.1","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.1.14","v1.1.13","v1.1.12","v1.1.11","v1.1.10","v1.1.9","v1.1.8","v1.1.7","v1.1.6","v1.1.5","v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.12.2","v0.12.1","v0.12.0","v0.11.2","v0.11.1","v0.11.0","v0.10.0","v0.9.2","v0.9.1","v0.8.0","v0.7.8","v0.7.7","v0.7.6","v0.7.5","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.0","v0.5.0","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.1","v0.4.0","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.1","v0.2.0","v0.1.2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-44503.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N"}]}