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-2026-114617

The Authlib Python library, used for building OAuth and OpenID Connect servers, contains a vulnerability in versions prior to 1.9.0 . The OpenIDMixin.parse_id_token() function incorrectly trusts the nonce_supported claim from an untrusted ID token. When this claim is set to false , the library se...

CVE-2026-114617 Authlib: ID token can disable its own nonce validation via the nonce_supported claim

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...

aad-fastapi-dl37 (>=1.0.0, <=1.0.2), agentstack-cli (>=0.4.0rc1, <=0.7.1) +301 more potentially affected by CVE-2026-114617 via authlib (>=1.0.0b2, <=1.8.0)

authlib PYPI version =1.0.0b2, =1.0.0, =0.4.0rc1, =0.1.0, =2.0.0, =2.0.0, =0.1.0, =0.5.0, =1.3.0a20250904, =1.2.0a20250730, =1.2.0a20250730, =0.0.0, =0.9.5, =1.7.0, =0.0.1, =0.1.0 and more Source cves: CVE-2026-114617 Source advisory: MEND:CVE-2026-114617...

CVE-2026-114617 Authlib: ID token can disable its own nonce validation via the nonce_supported claim

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-2026-114617

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-2026-114617 Authlib: ID token can disable its own nonce validation via the nonce_supported claim

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-2026-114614

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0, authlib.common.security.issecuretransport uses a textual prefix comparison for loopback HTTP exemptions, so a URL whose userinfo begins with a loopback host can be accepted even when its parsed host ...

CVE-2026-114614

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0, authlib.common.security.issecuretransport uses a textual prefix comparison for loopback HTTP exemptions, so a URL whose userinfo begins with a loopback host can be accepted even when its parsed host ...

UBUNTU-CVE-2026-114614

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0, authlib.common.security.issecuretransport uses a textual prefix comparison for loopback HTTP exemptions, so a URL whose userinfo begins with a loopback host can be accepted even when its parsed host ...

CVE-2026-114614

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0, authlib.common.security.issecuretransport uses a textual prefix comparison for loopback HTTP exemptions, so a URL whose userinfo begins with a loopback host can be accepted even when its parsed host ...

aad-fastapi-dl37 (>=1.0.0, <=1.0.2), agentstack-cli (>=0.4.0rc1, <=0.7.1) +301 more potentially affected by CVE-2026-114616 via authlib (>=1.0.0b2, <=1.8.0)

authlib PYPI version =1.0.0b2, =1.0.0, =0.4.0rc1, =0.1.0, =2.0.0, =2.0.0, =0.1.0, =0.5.0, =1.3.0a20250904, =1.2.0a20250730, =1.2.0a20250730, =0.0.0, =0.9.5, =1.7.0, =0.0.1, =0.1.0 and more Source cves: CVE-2026-114616 Source advisory: MEND:CVE-2026-114616...

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-2026-114616

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-2026-114616 Authlib accepts an empty HMAC key, allowing JWS/JWT signature forgery (HS256/HS384/HS512)

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-2026-114616

The Authlib Python library (prior to version 1.9.1 ) is vulnerable to a security flaw in its OctKey.import_key() and HMAC signing/verification paths. These paths incorrectly accept zero-length key material . If an application's secret lookup returns an empty string or empty bytes, a remote attack...

CVE-2026-114616 Authlib accepts an empty HMAC key, allowing JWS/JWT signature forgery (HS256/HS384/HS512)

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-2026-114615

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-2026-114615 Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys

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-2026-114615

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...