Improper Verification of Cryptographic Signature Affecting sigstore package, versions <4.1.1
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Test your applications- Snyk IDSNYK-JS-SIGSTORE-17817054
- published4 Jul 2026
- disclosed1 Jul 2026
- creditUnknown
Introduced: 1 Jul 2026
NewCVE-2026-48815 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade sigstore to version 4.1.1 or higher.
Overview
sigstore is a code-signing for npm packages
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature due to the certificateOIDs option being accepted by the public API but discarded before verification, resulting in required certificate extension OIDs never being checked. An attacker can bypass intended certificate extension constraints by presenting unauthorized certificates that satisfy the remaining verification checks.