VDB
CVE-2026-24408
CVE-2026-24408
PUBLISHED
CVSS 5 MEDIUM
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.
EPSS 0.16% · 5.5th percentile
Risk Scores
CVSS 3.1
5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
EPSS Score
0.16%
5.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| linuxfoundation | sigstore-python | 0, 0 |
| Salesforce | flow | |
| PyPI | sigstore | 0, 0 |
| sigstore | sigstore-python | < 4.2.0, < 4.2.0 |
Timeline
- Jan 26, 2026 CVE Published
- Jan 27, 2026 EPSS Score
- Jan 27, 2026 PoC Published
- Jan 29, 2026 CVE Updated
- Jan 30, 2026 EPSS Score
- Jan 30, 2026 Security Advisory
- Feb 1, 2026 EPSS Score
- Feb 4, 2026 EPSS Score
- Feb 6, 2026 EPSS Score
- Feb 9, 2026 EPSS Score
- Feb 12, 2026 EPSS Score
- Feb 14, 2026 EPSS Score
References
- https://github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vr url
- https://nvd.nist.gov/vuln/detail/CVE-2026-24408 advisory
- https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa fix
- https://github.com/sigstore/sigstore-python/releases/tag/v4.2.0 fix
- https://github.com/sigstore/sigstore-python package