Cross-site Request Forgery (CSRF)

Overview authlib is a library in building OAuth and OpenID Connect servers. Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF in the Client integrations due to the lack of CSRF protection for cash parameters. An attacker can perform unauthorized actions on behalf...

GHSA-JJ8C-MMJ3-MMGV Authlib: Cross-site request forging when using cache

Summary There is no CSRF protection on the cache feature on most integrations clients. Details In authlib.integrations.starletteclient.OAuth, no CSRF protection is set up when using the cache parameter. When not using the cache parameter, the use of SessionMiddleware ties the client to the auth...

aad-fastapi (>=1.0.0 <=1.1.2), aad-fastapi-dl37 (>=1.0.0 <=1.0.3) +232 more potentially affected by CVE-2026-41425 via authlib (>=0.10.0 <=1.6.10)

authlib PYPI version =0.10.0, =1.0.0, =1.0.0, =0.0.1, =1.0.2, =1.0.2, =1.2.0a20250730, =1.1.0, =1.2.0a20250730, =0.1.0, =0.1.0a1, =1.2.0, =1.2.0a20250730, =1.2.0a20250730, =1.2.0a20250730, =1.2.0, =1.2.1 and more Source cves: CVE-2026-41425 Source advisory: OSV:GHSA-JJ8C-MMJ3-MMGV...

PT-2026-35068

Name of the Vulnerable Software and Affected Versions Authlib versions prior to 1.6.11 Description Authlib is a Python library used to build OAuth and OpenID Connect servers. A lack of Cross-Site Request Forgery CSRF protection exists in the cache feature of the 'authlib.integrations.starlette...

SUSE: Security Advisory (SUSE-SU-2026:0975-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

openSUSE Security Advisory (SUSE-SU-2026:0975-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python-Authlib (SUSE-SU-2026:0975-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0975-1 advisory. - CVE-2026-27962: JWS deserializecompact allows for signature bypass by accepting user-controlle...

Security update for python-Authlib

This update for python-Authlib fixes the following issues: CVE-2026-27962: JWS deserializecompact allows for signature bypass by accepting user-controlled embedded JWK as verification key bsc1259738. CVE-2026-28490: cryptographic padding oracle in JWE RSA15 key management algorithm bsc1259736...

Authentication Bypass

Authlib is vulnerable to Authentication Bypass. The vulnerability is due to fail-open behavior in the verifyhash function when processing unsupported or unknown algorithms, where hash validation incorrectly returns success, allowing attackers to forge ID Tokens and bypass integrity checks...

OPENSUSE-SU-2026:20392-1 Security update for python-Authlib

This update for python-Authlib fixes the following issues: Changes in python-Authlib: - CVE-2026-27962: JWS deserializecompact allows for signature bypass by accepting user-controlled embedded JWK as verification key bsc1259738 - CVE-2026-28490: cryptographic padding oracle in JWE RSA15 key...

SUSE CVE-2026-27962

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 pass signature verification. When key=None is passed to any...

SUSE CVE-2026-28490

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a cryptographic padding oracle vulnerability was identified in the Authlib Python library concerning the implementation of the JSON Web Encryption JWE RSA15 key management algorithm. Authlib registe...

SUSE CVE-2026-28498

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. Specifically, the internal hash verification logic verifyhash...

aad-fastapi-dl37 (>=1.0.0 <=1.0.2), agentiq (>=1.2.0a20250730 <=1.2.0rc4) +225 more potentially affected by CVE-2026-28490 via authlib (>=1.0.0 <=1.6.8)

authlib PYPI version =1.0.0, =1.0.0, =1.2.0a20250730, =1.1.0, =1.2.0a20250730, =0.4.0, =0.1.0, =0.5.0, =0.1.0a1, =1.2.0, =1.2.0a20250730, =1.2.0a20250730, =1.2.0a20250730, =1.2.0, =1.2.0a20250730, =1.2.0a20250730, =1.2.0rc4 and more Source cves: CVE-2026-28490 Source advisory:...

Timing Attack

Overview authlib is a library in building OAuth and OpenID Connect servers. Affected versions of this package are vulnerable to Timing Attack via the unwrap length check in jwealgs.py. An attacker can recover the CEK and decrypt or forge JWE tokens by sending malformed RSA15 ciphertexts and...

Not Failing Securely ('Failing Open')

Overview authlib is a library in building OAuth and OpenID Connect servers. Affected versions of this package are vulnerable to Not Failing Securely 'Failing Open' via the verifyhash function in authlib/oidc/core/claims.py. An attacker can substitute an access token or authorization code undetect...

aad-fastapi-dl37 (>=1.0.0 <=1.0.2), agentiq (>=1.2.0a20250730 <=1.2.0rc4) +225 more potentially affected by CVE-2026-28498 via authlib (>=1.0.0 <=1.6.8)

authlib PYPI version =1.0.0, =1.0.0, =1.2.0a20250730, =1.1.0, =1.2.0a20250730, =0.4.0, =0.1.0, =0.5.0, =0.1.0a1, =1.2.0, =1.2.0a20250730, =1.2.0a20250730, =1.2.0a20250730, =1.2.0, =1.2.0a20250730, =1.2.0a20250730, =1.2.0rc4 and more Source cves: CVE-2026-28498 Source advisory:...

aad-fastapi-dl37 (>=1.0.0 <=1.0.2), agentiq (>=1.2.0a20250730 <=1.2.0rc4) +225 more potentially affected by CVE-2026-27962 via authlib (>=1.0.0 <=1.6.8)

authlib PYPI version =1.0.0, =1.0.0, =1.2.0a20250730, =1.1.0, =1.2.0a20250730, =0.4.0, =0.1.0, =0.5.0, =0.1.0a1, =1.2.0, =1.2.0a20250730, =1.2.0a20250730, =1.2.0a20250730, =1.2.0, =1.2.0a20250730, =1.2.0a20250730, =1.2.0rc4 and more Source cves: CVE-2026-27962 Source advisory:...

Improper Verification of Cryptographic Signature

Overview authlib is a library in building OAuth and OpenID Connect servers. Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the JsonWebSignature.preparealgorithmkey method in authlib/jose/rfc7515/jws.py. An attacker can bypass authenticatio...

CVE-2026-28498

A flaw was found in Authlib, a Python library used for building OAuth and OpenID Connect OIDC servers. This vulnerability allows a remote attacker to bypass critical integrity checks in OIDC ID Tokens. Specifically, the library's internal hash verification logic fails open when encountering an...