CVE-2026-41479: falha de média gravidade em authlib
Authlib OAuth 2.0 authorization endpoint open redirects to attacker-controlled redirect_uri on unsupported response_type
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 5.4epss 0.3%
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.10 and 1.7.1, Authlib's OAuth 2.0 authorization endpoint can be turned into an unauthenticated open redirect when a request uses an unsupported response_type and supplies an attacker-controlled redirect_uri. The vulnerable behavior happens before client lookup and before any redirect URI validation. As a result, an attacker does not need a valid client registration, an authenticated user, or any prior state. A single request to the authorization endpoint is enough to obtain a 302 Location response to an arbitrary attacker-controlled URL. This vulnerability is fixed in 1.6.10 and 1.7.1.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Produtos afetados
authlib · authlibCVEs relacionadas — authlib
No mesmo produto, das mais perigosas para as menos.
CVE-2025-61920HIGHAuthlib is vulnerable to Denial of Service via Oversized JOSE SegmentsEPSS 0.6%CVE-2026-27962CRITICALAuthlib JWS JWK Header Injection: Signature Verification BypassEPSS 0.6%CVE-2026-28802HIGHAuthlib: Setting `alg: none` and a blank signature appears to bypass signature verificationEPSS 0.5%CVE-2025-62706MEDIUMAuthlib : JWE zip=DEF decompression bomb enables DoSEPSS 0.5%CVE-2026-114620MEDIUMAuthlib: Unvalidated request_uri fetch in JWT-secured authorization request (JAR) leading to SSRFEPSS 0.4%CVE-2026-114618MEDIUMAuthlib: Default JWT bearer grant accepts assertions for the wrong audienceEPSS 0.4%