CVE-2026-49336

@microsoft/kiota-http-fetchlibrary provides TypeScript libraries for Kiota-generated API clients. In versions 1.0.0-preview.97 through 1.0.0-preview.101, @microsoft/kiota-http-fetchlibrary's RedirectHandler is documented as stripping Authorization and Cookie from cross-origin redirect targets, bu...

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

@microsoft/kiota-http-fetchlibrary provides TypeScript libraries for Kiota-generated API clients. In versions 1.0.0-preview.97 through 1.0.0-preview.101, @microsoft/kiota-http-fetchlibrary's RedirectHandler is documented as stripping Authorization and Cookie from cross-origin redirect targets, bu...

CVE-2026-49336

The CVE concerns @microsoft/kiota-http-fetchlibrary (TypeScript) in versions 1.0.0-preview.97–1.0.0-preview.101, where RedirectHandler’s scrubSensitiveHeaders uses case-sensitive deletion (delete headers.Authorization, delete headers.Cookie) on a headers object already lower-cased by FetchRequest...

Open Redirect

Overview @microsoft/kiota-http-fetchlibrary is an implementation using the Fetch API to make requests. Affected versions of this package are vulnerable to Open Redirect in the RedirectHandler function. An attacker can obtain sensitive information such as session cookies, proxy credentials, and AP...