PT-2026-51008 · Microsoft · Kiota-Typescript

Publicado 2026-06-19 · Atualizado 2026-06-19 · CVE-2026-49336

Mitre

CVSS v4.0

6.9

Média

Vetor base

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

@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, but the default scrubSensitiveHeaders callback in RedirectHandlerOptions uses case-sensitive property deletion (delete headers.Authorization, delete headers.Cookie) on a headers object that FetchRequestAdapter.getRequestFromRequestInformation has already lower-cased. The delete therefore targets keys that do not exist, the scrub is a no-op, and any Bearer token or Cookie attached by a kiota-generated SDK is forwarded to an attacker-controlled host across a 30x redirect. This is reachable in the default middleware chain (MiddlewareFactory.getDefaultMiddlewares) with no custom configuration, and applies to every kiota-generated TypeScript SDK that uses BaseBearerTokenAuthenticationProvider or any other authentication provider that sets the Authorization request header. Version 1.0.0-preview.102 patches the issue.

Correção

Information Disclosure

Enumeração de Fraquezas

CWE-200

CWE-178

Identificadores relacionados

CVE-2026-49336

Produtos afetados

Kiota-Typescript

Referências · 3

• https://github.com/microsoft/kiota-typescript/security/advisories/GHSA-396q-4vc8-28x9 · Nota
• https://github.com/microsoft/kiota-typescript/commit/09f8bd9b34d68bf412a9b78f6ca7e7961ef14974 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-49336 · Nota de Segurança