CVE-2026-24408— sigstore has CSRF possibility in OIDC authentication during signing
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I. Basic Information for CVE-2026-24408
Vulnerability Information
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Vulnerability Title
sigstore has CSRF possibility in OIDC authentication during signing
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨站请求伪造(CSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
sigstore-python 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sigstore-python是sigstore开源的一个用于生成和验证 Sigstore 签名的 Python 工具。 sigstore-python 4.2.0之前版本存在跨站请求伪造漏洞，该漏洞源于OAuth身份验证流程存在跨站请求伪造，可能导致攻击者绕过身份验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| sigstore | sigstore-python | < 4.2.0 | - |
II. Public POCs for CVE-2026-24408
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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Cosign Certificate Chain Expiry Validation Issue Allows Issu - CVE-2026-24137
sigstore legacy TUF client allows for arbitrary file writes
Same weakness: CWE-352
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Emlog: Cross-Site Request Forgery in Admin Functions
V. Comments for CVE-2026-24408
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