CVE-2026-44503highCWE-601

CVE-2026-44503: high-severity vulnerability in microsoft kiota-java

Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect

Published

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7epss 0.6%
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:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Affected products
microsoft · github.com/microsoft/kiota-http-gomicrosoft · kiota-javamicrosoft · kiota-typescriptmicrosoft · microsoft-kiota-abstractionsmicrosoft · Microsoft.Kiota.Abstractionsmicrosoft · microsoft-kiota-http
Related CVEs — microsoft kiota-java

In the same product, most dangerous first.

CVE-2026-49336MEDIUM@microsoft/kiota-http-fetchlibrary: Bearer token and Cookie leak across origin on redirect due to case-mismatched scrub in fetchRequestAdapterEPSS 0.7%