{"cve":"CVE-2026-24408","nvd":{"published":"2026-01-26T23:16:08.973","modified":"2026-06-17T10:23:01.360","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L","score":5.0},"cwes":["CWE-352"],"references":["https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa","https://github.com/sigstore/sigstore-python/releases/tag/v4.2.0","https://github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vr"],"products":["linuxfoundation:sigstore-python"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2026-24408","score":0.00178,"percentile":0.07376,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hm8f-75xx-w2vr","url":"https://osv.dev/vulnerability/GHSA-hm8f-75xx-w2vr","summary":"sigstore CSRF possibility in OIDC authentication during signing","modified":"2026-07-07T17:56:21.154649760Z","packages":[{"ecosystem":"PyPI","name":"sigstore","purl":"pkg:pypi/sigstore","ranges":["<4.2.0"],"fixed":["4.2.0"]}]},{"id":"PYSEC-2026-1924","url":"https://osv.dev/vulnerability/PYSEC-2026-1924","summary":"sigstore CSRF possibility in OIDC authentication during signing","modified":"2026-07-07T17:47:52.920906253Z","packages":[{"ecosystem":"PyPI","name":"sigstore","purl":"pkg:pypi/sigstore","ranges":["<4.2.0"],"fixed":["4.2.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}