Cross-site Request Forgery (CSRF) Affecting authlib package, versions [,1.6.11)
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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- published17 Apr 2026
- disclosed16 Apr 2026
- creditUnknown
Introduced: 16 Apr 2026
CVE-2026-41425 (opens in a new tab)How to fix?
Upgrade authlib to version 1.6.11 or higher.
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 of a user by tricking the victim into following a crafted authentication flow, which results in the attacker's account being linked to the victim's session.
Note:
Version 1.6.11 patches CSRF issue only in Starlette Client. Other integrations might still be vulnerable.