CVE-2026-24408
January 26, 2026
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
https://github.com/sigstore/sigstore-python.git (GITHUB):
Affected version(s) >=v0.0.1-pre.1 <v4.2.0Fix Suggestion:
Update to version v4.2.0sigstore (PYTHON):
Affected version(s) >=0.0.1rc1 <4.2.0Fix Suggestion:
Update to version 4.2.0Related Resources (5)
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Contact UsCVSS v4
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Weakness Type (CWE)
Cross-Site Request Forgery (CSRF)
EPSS
Base Score:
0.01
