Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDMixin.parse_id_token() reads the nonce_supported 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 relying parties, or applications that directly accept externally supplied ID tokens, an attacker with a captured validly signed token can bypass the nonce-to-session binding and replay the victim's token into an attacker-controlled session. Plain authorization code flow is not affected, and the token must still pass signature, issuer, and audience validation. OpenIDMixin.parse_id_token() trusts nonce_supported in both authlib/integrations/base_client/sync_openid.py and authlib/integrations/base_client/async_openid.py to disable the expected nonce. This issue is fixed in version 1.9.0.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0,
    OpenIDMixin.parse_id_token() reads the nonce_supported 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 relying parties, or applications that directly accept externally supplied ID tokens, an attacker
    with a captured validly signed token can bypass the nonce-to-session binding and replay the victim's token
    into an attacker-controlled session. Plain authorization code flow is not affected, and the token must
    still pass signature, issuer, and audience validation. OpenIDMixin.parse_id_token() trusts nonce_supported
    in both authlib/integrations/base_client/sync_openid.py and
    authlib/integrations/base_client/async_openid.py to disable the expected nonce. This issue is fixed in
    version 1.9.0. (CVE-2026-114617)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0,     OpenIDMixin.parse_id_token() reads the nonce_supported 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 relying parties, or applications that directly accept externally supplied ID tokens, an attacker     with a captured validly signed token can bypass the nonce-to-session binding and replay the victim's token     into an attacker-controlled session. Plain authorization code flow is not affected, and the token must     still pass signature, issuer, and audience validation. OpenIDMixin.parse_id_token() trusts nonce_supported     in both authlib/integrations/base_client/sync_openid.py and     authlib/integrations/base_client/async_openid.py to disable the expected nonce. This issue is fixed in     version 1.9.0. (CVE-2026-114617)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
477760	Chainguard: py3.12-airflow-3: security update to 3.3.2-r11	Tenable Cloud Security	Chainguard Local Security Checks	Local	medium
477760	Chainguard: py3.12-airflow-3: security update to 3.3.2-r11	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	medium
477595	SCA: security update for authlib (GHSA-c5mf-xmp2-59rc)	Tenable Cloud Security	SCA Checks	Local	medium
477595	SCA: security update for authlib (GHSA-c5mf-xmp2-59rc)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
371290	Linux Distros Unpatched Vulnerability : CVE-2026-114617	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-114617

medium

Tenable Plugins

medium

medium

medium

medium

medium