CVE-2026-24408

The record

sigstore-python is a Python tool for generating and verifying Sigstore signatures. Prior to version 4.2.0, the sigstore-python OAuth authentication flow is susceptible to Cross-Site Request Forgery. `_OAuthSession` creates a unique "state" and sends it as a parameter in the authentication request but the "state" in the server response seems not not be cross-checked with this value. Version 4.2.0 contains a patch for the issue.

Affected packages

Related vulnerabilities

• GHSA-hm8f-75xx-w2vr sigstore CSRF possibility in OIDC authentication during signing Same vulnerability
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