Low severityOSV Advisory· Published Jan 26, 2026· Updated Jan 27, 2026
sigstore has CSRF possibility in OIDC authentication during signing
CVE-2026-24408
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
sigstorePyPI | < 4.2.0 | 4.2.0 |
Affected products
3- Range: v0.0.1-pre.1, v0.0.1-pre.3, v0.1.0, …
- ghsa-coords2 versions
< 4.2.0+ 1 more
- (no CPE)range: < 4.2.0
- (no CPE)range: < 4.2.0-1.1
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-hm8f-75xx-w2vrghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-24408ghsaADVISORY
- github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aaghsax_refsource_MISCWEB
- github.com/sigstore/sigstore-python/releases/tag/v4.2.0ghsax_refsource_MISCWEB
- github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vrghsax_refsource_CONFIRMWEB
News mentions
0No linked articles in our index yet.