{"cve":"CVE-2026-44503","nvd":{"published":"2026-05-14T16:16:24.223","modified":"2026-10-26T14:10:00.130","status":"Deferred","description":"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.","cvss_v4":{"vector":"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","score":7.0},"cvss_v3":null,"cwes":["CWE-601"],"references":["https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9","https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9"],"products":[],"source":"nvd","synced_at":"2026-10-26T14:27:29.784594657+00:00"},"epss":{"cve":"CVE-2026-44503","score":0.00565,"percentile":0.46652,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-7j59-v9qr-6fq9","url":"https://osv.dev/vulnerability/GHSA-7j59-v9qr-6fq9","summary":"Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect","modified":"2026-09-10T03:50:46.498025328Z","packages":[{"ecosystem":"Maven","name":"com.microsoft.kiota:microsoft-kiota-abstractions","purl":"pkg:maven/com.microsoft.kiota/microsoft-kiota-abstractions","ranges":["<1.9.1"],"fixed":["1.9.1"]},{"ecosystem":"NuGet","name":"Microsoft.Kiota.Abstractions","purl":"pkg:nuget/Microsoft.Kiota.Abstractions","ranges":["<1.22.0"],"fixed":["1.22.0"]},{"ecosystem":"PyPI","name":"microsoft-kiota-http","purl":"pkg:pypi/microsoft-kiota-http","ranges":["<1.9.9"],"fixed":["1.9.9"]},{"ecosystem":"npm","name":"kiota-typescript","purl":"pkg:npm/kiota-typescript","ranges":["<1.0.0-preview.100"],"fixed":["1.0.0-preview.100"]},{"ecosystem":"Go","name":"github.com/microsoft/kiota-http-go","purl":"pkg:golang/github.com/microsoft/kiota-http-go","ranges":["<1.5.5"],"fixed":["1.5.5"]}]},{"id":"GO-2026-5224","url":"https://osv.dev/vulnerability/GO-2026-5224","summary":"Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect in github.com/microsoft/kiota-http-go","modified":"2026-08-17T21:26:53.188705506Z","packages":[{"ecosystem":"Go","name":"github.com/microsoft/kiota-http-go","purl":"pkg:golang/github.com/microsoft/kiota-http-go","ranges":["<1.5.5"],"fixed":["1.5.5"]}]},{"id":"PYSEC-2026-2647","url":"https://osv.dev/vulnerability/PYSEC-2026-2647","summary":"Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect","modified":"2026-07-13T16:43:36.594047963Z","packages":[{"ecosystem":"PyPI","name":"microsoft-kiota-http","purl":"pkg:pypi/microsoft-kiota-http","ranges":["<1.9.9"],"fixed":["1.9.9"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}