CVE-2026-44503 — Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect
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 w…
Published: 2026-05-14 · CVSS: 7.0 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7