CVE-2026-114616

A flaw was found in Authlib. The library improperly accepts zero-length key material during Hash-based Message Authentication Code HMAC signing and verification. If a host application verifies tokens using a secret that evaluates to an empty value, a remote attacker can generate predictable...

CVE-2026-114615

A flaw was found in Authlib. When verifying JSON Web Tokens JWT, the library fails to properly recognize asymmetric public keys that contain leading whitespace, comments, or formatting prefixes. An unauthenticated remote attacker who knows the public key can exploit this flaw to forge symmetric...

CVE-2026-114614

A flaw was found in Authlib. The library's transport security verification improperly validates web addresses by using prefix matching to exempt local loopback addresses from encryption requirements. A remote attacker can exploit this issue by supplying a crafted URL containing local host...

CVE-2026-114620

A flaw was found in Authlib. A remote attacker can trigger Server-Side Request Forgery SSRF by submitting an unvalidated request URI parameter in an authorization request. Because the library forwards client-supplied addresses to internal retrieval handlers without enforcing destination policies ...

CVE-2026-114617

A flaw was found in Authlib. When validating OpenID Connect OIDC identity tokens, the library improperly relies on a claim within the incoming token to decide whether to enforce nonce verification, which binds the token to an active session. A remote attacker with a captured, validly signed token...

CVE-2026-114619

A flaw was found in Authlib. This vulnerability allows an authenticated client to bypass authorization scope restrictions and obtain an unauthorized OpenID Connect OIDC identity token, leading to information disclosure. During an implicit grant authorization request, the application evaluates the...

CVE-2026-114618

A flaw was found in Authlib. In the default JSON Web Token JWT bearer grant implementation, audience claims are checked only for existence rather than validated against the target authorization server. A remote attacker holding a legitimate token issued for another service can present it to a...

DEBIAN-CVE-2026-114620

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, Authlib's RFC 9101 JWTAuthenticationRequest passes the unauthenticated, client-controlled requesturi parameter to the abstract getrequestobject hook before applying a destination or registration policy; the...

CVE-2026-114620

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, Authlib's RFC 9101 JWTAuthenticationRequest passes the unauthenticated, client-controlled requesturi parameter to the abstract getrequestobject hook before applying a destination or registration policy; the...

DEBIAN-CVE-2026-114617

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDMixin.parseidtoken reads the noncesupported decision from the untrusted ID token being validated and sets the expected nonce to null when that claim is the JSON boolean false. In implicit and hybrid...

DEBIAN-CVE-2026-114618

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, the default RFC 7523 JWTBearerGrant.getaudiences returns an empty list, causing JWTBearerGrant.verifyclaims to require only that an aud claim exists without matching the current authorization server. An...

DEBIAN-CVE-2026-114615

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 1.3.1 until 1.9.0, OctKey.importkey checks asymmetric-key markers only at byte zero while Authlib's PEM loaders accept leading whitespace, comments, or a byte-order mark. In deployments that use the documented mixed...

DEBIAN-CVE-2026-114616

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.1, Authlib's OctKey.importkey and HMAC signing and verification path accept zero-length key material. If an application's secret lookup can return an empty string or empty bytes, a remote attacker can compute...

DEBIAN-CVE-2026-114619

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDImplicitGrant.validateauthorizationrequest checks the client-controlled raw request.payload.scope for openid after the parent grant has filtered allowed scopes into request.scope. A registered client...

CVE-2026-114615

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 1.3.1 until 1.9.0, OctKey.importkey checks asymmetric-key markers only at byte zero while Authlib's PEM loaders accept leading whitespace, comments, or a byte-order mark. In deployments that use the documented mixed...

CVE-2026-114618

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, the default RFC 7523 JWTBearerGrant.getaudiences returns an empty list, causing JWTBearerGrant.verifyclaims to require only that an aud claim exists without matching the current authorization server. An...

CVE-2026-114617

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDMixin.parseidtoken reads the noncesupported decision from the untrusted ID token being validated and sets the expected nonce to null when that claim is the JSON boolean false. In implicit and hybrid...

CVE-2026-114619

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDImplicitGrant.validateauthorizationrequest checks the client-controlled raw request.payload.scope for openid after the parent grant has filtered allowed scopes into request.scope. A registered client...

CVE-2026-114616

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.1, Authlib's OctKey.importkey and HMAC signing and verification path accept zero-length key material. If an application's secret lookup can return an empty string or empty bytes, a remote attacker can compute...

CVE-2026-114620

The Authlib Python library (prior to version 1.9.0 ) is vulnerable to Server-Side Request Forgery (SSRF) in its RFC 9101 JWT-secured authorization request (JAR) implementation. The root cause is that the JWTAuthenticationRequest class forwards an unauthenticated, client-controlled request_uri par...