Open Redirect Affecting authlib package, versions [,1.6.10)[1.7.0,1.7.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-AUTHLIB-17266082
- published9 Jun 2026
- disclosed8 Jun 2026
- creditChaoran Tao
Introduced: 8 Jun 2026
CVE-2026-41479 (opens in a new tab)How to fix?
Upgrade authlib to version 1.6.10, 1.7.1 or higher.
Overview
authlib is a library in building OAuth and OpenID Connect servers.
Affected versions of this package are vulnerable to Open Redirect via the AuthorizationServer.get_authorization_grant() function in the OAuth 2.0 authorization endpoint. An attacker can redirect users to arbitrary external URLs by supplying a crafted redirect_uri parameter in an authorization request with an unsupported response_type. This can be exploited without any valid client registration or authenticated user, allowing phishing or bypassing domain-based allowlists.