CVE-2026-24408

Published January 26th, 2026

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CVSS v3

N/A

CVSS v2

N/A

Affected

PROJECT

Description

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.

sigstore/sigstore-python

A Sigstore client written in Python

GitHub

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