High 7.0Published May 14, 2026

CVE-2026-44503Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect

Updated under an hour ago (Oct 27, 2026, 3:50 AM ET)

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It affects microsoft kiota-java and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for microsoft kiota-java

Exploited in the last 30 days

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: 7.0 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-601
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: May 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

microsoft kiota-java microsoft:kiota_java (from the name)	before 1.9.1	CNA record
microsoft Microsoft.Kiota.Abstractions microsoft:microsoft.kiota.abstractions (from the name)	before 1.22.0	CNA record
microsoft github.com/microsoft/kiota-http-go microsoft:github.com_microsoft_kiota_http_go (from the name)	before 1.5.5	CNA record
microsoft kiota-typescript microsoft:kiota_typescript (from the name)	before 1.0.0-preview.100	CNA record
microsoft microsoft-kiota-abstractions microsoft:kiota_abstractions (from the name)	before 1.9.1	CNA record
microsoft microsoft-kiota-http microsoft:kiota_http (from the name)	before 1.9.9	CNA record

References

References

https://github.com/microsoft/kiota-java/security/advisories/GHSA-7j59-v9qr-6fq9	x-refsource-confirm

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.