authlib vulnerabilities
CVEs whose affected-version data names the authlib package (pip). Each record lists the affected and patched versions; check a specific version with the dependency checker or POST /api/sbom.
20 CVEsRSS
CVE-2026-116672High· 8.8Authlib RFC 7592 examples omit registration-access-token client binding
Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.15 until 1.9.1, the documented ClientConfigurationEndpoint.authenticate_client and ClientConfigurationEndpoint.check_permission reference implementations l…
CVE-2026-114620Medium· 5.4Authlib: Unvalidated request_uri fetch in JWT-secured authorization request (JAR) leading to SSRF
Authlib: Unvalidated request_uri fetch in JWT-secured authorization request (JAR) leading to SSRF
CVE-2026-114619Medium· 4.6Authlib: OpenID implicit grant checks raw scope instead of allowed scope before issuing ID tokens
Authlib: OpenID implicit grant checks raw scope instead of allowed scope before issuing ID tokens
CVE-2026-114618Medium· 6.8Authlib: Default JWT bearer grant accepts assertions for the wrong audience
Authlib: Default JWT bearer grant accepts assertions for the wrong audience
CVE-2026-114617Medium· 4.2⚖ disputedAuthlib: ID token can disable its own nonce validation via the nonce_supported claim
Authlib: ID token can disable its own nonce validation via the nonce_supported claim
CVE-2026-114616High· 7.4Authlib accepts an empty HMAC key, allowing JWS/JWT signature forgery (HS256/HS384/HS512)
Authlib accepts an empty HMAC key, allowing JWS/JWT signature forgery (HS256/HS384/HS512)
CVE-2026-114615High· 7.4Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys
Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys
CVE-2026-114614Low· 2.6Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback…
Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback hosts
CVE-2026-104056Critical· 9.8PoC⚖ disputedAuthlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding
Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controll…
GHSA-6m87-8wg6-hh8wCritical· 9.8Duplicate Advisory: Authlib: empty signatures validation in JWS JSON deserialization
Duplicate Advisory: Authlib: empty signatures validation in JWS JSON deserialization
CVE-2026-96760Critical· 9.8PoC⚖ disputedAuthlib (v1.7.2 and below) contains a signature verification bypass vulnerability
Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking f…
CVE-2026-41479Medium· 5.4Authlib OAuth 2.0 has Open Redirect in Authorization API that allows attacker-controlled redirect_uri through unsupported response_type
Authlib OAuth 2.0 has Open Redirect in Authorization API that allows attacker-controlled redirect_uri through unsupported response_type
CVE-2026-41425Medium· 5.4Authlib: Cross-site request forging when using cache
Authlib: Cross-site request forging when using cache
CVE-2026-28490HighAuthlib Vulnerable to JWE RSA1_5 Bleichenbacher Padding Oracle
Authlib Vulnerable to JWE RSA1_5 Bleichenbacher Padding Oracle
CVE-2026-28498High· 7.5PoCAuthlib is a Python library which builds OAuth and OpenID Connect servers
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a library-level vulnerability was identified in the Authlib Python library concerning the validation of OpenID Connect (OIDC) ID Tokens. S…
CVE-2026-27962Critical· 9.1PoCAuthlib is a Python library which builds OAuth and OpenID Connect servers
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticated attacker to forge arbitrary JWT tokens that…
CVE-2026-28802Critical· 9.8⚖ disputedAuthlib is a Python library which builds OAuth and OpenID Connect servers
Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature…
CVE-2025-68158Medium· 5.7Authlib is a Python library which builds OAuth and OpenID Connect servers
Authlib is a Python library which builds OAuth and OpenID Connect servers. In versions 1.0.0 through 1.6.5, cache-backed state/request-token storage is not tied to the initiating user session, so CSRF is possible for any attacker that ha…
CVE-2025-61920High· 7.5Authlib is vulnerable to Denial of Service via Oversized JOSE Segments
Authlib is vulnerable to Denial of Service via Oversized JOSE Segments
CVE-2025-62706Medium· 6.5Authlib : JWE zip=DEF decompression bomb enables DoS
Authlib : JWE zip=DEF decompression bomb enables DoS