CVE-2026-44503
High
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.
SeverityHigh
CVSS7.0
Exploit probability—
ProductMicrosoft-kiota-http
PublishedMay 14, 2026
First seenMay 14, 2026
Weakness typeCWE-601Open redirect
How to fix
Update
- microsoft-kiota-http1.9.9 or later
- com.microsoft.kiota:microsoft-kiota-abstractions1.9.1 or later
- Microsoft.Kiota.Abstractions1.22.0 or later
- kiota-typescript1.0.0-preview.100 or later
- github.com/microsoft/kiota-http-go1.5.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft-kiota-httpPyPI | v < 1.9.9 | 1.9.9 |
| com.microsoft.kiota:microsoft-kiota-abstractionsMaven | v < 1.9.1 | 1.9.1 |
| Microsoft.Kiota.AbstractionsNuGet | v < 1.22.0 | 1.22.0 |
| kiota-typescriptnpm | v < 1.0.0-preview.100 | 1.0.0-preview.100 |
| github.com/microsoft/kiota-http-goGo | v < 1.5.5 | 1.5.5 |
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