CVE-2026-24408

MEDIUM EPSS 5.4%
Published Jan 26, 20265mo ago · Modified Jun 17, 20262w ago
5.0 CVSS 3.1
Medium
Find Similar
Published Jan 26, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.0
Exploitability
1.6
Impact
3.4
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low

Threat Intelligence

EPSS Exploit Probability
5.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-352 Cross-Site Request Forgery (CSRF) Authentication

Affected Products 1

VendorProductVersionRange
linuxfoundationsigstore-python* <4.2.0

References 3

  • github.com https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa
    Patch
  • github.com https://github.com/sigstore/sigstore-python/releases/tag/v4.2.0
    ProductRelease Notes
  • github.com https://github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vr
    Vendor Advisory

Remediation

  • github.com https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa
    Patch