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.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:4111-1 advisory.

    This update for python-Authlib fixes the following issue:

    - CVE-2026-41479: crafted authorization requests with unsupported response_types can cause unauthenticated     open       redirects (bsc#1275231).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:21795-1 advisory.

    Changes in python-Authlib:

    - CVE-2026-41479: Open Redirect vulnerability via crafted authorization       requests (bsc#1275231)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

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 1.6.10 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. (CVE-2026-41479)

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 1.6.10 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. (CVE-2026-41479)

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

ID	Name	Product	Family	Type	Severity
345831	SUSE SLED15 / SLES15 Security Update : python-Authlib (SUSE-SU-2026:4111-1)	Nessus	SuSE Local Security Checks	Local	medium
343952	openSUSE 16 Security Update : python-Authlib (openSUSE-SU-2026:21795-1)	Nessus	SuSE Local Security Checks	Local	medium
444854	SCA: security update for authlib (GHSA-w8p2-r796-3vmq)	Tenable Cloud Security	SCA Checks	Local	medium
444854	SCA: security update for authlib (GHSA-w8p2-r796-3vmq)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
322299	Linux Distros Unpatched Vulnerability : CVE-2026-41479	Nessus	Misc.	Local	medium

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CVE-2026-41479

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medium