CVE-2026-48758
MEDIUM
NVD
CVSS Score
5.4
Severity
MEDIUM
Published
Jul 14, 2026
Vendor
unknown
Description
sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the PAE string to bytes, allowing payloadType to be mutated after signing without invalidating the signature and breaking the type-binding guarantee that DSSE is designed to provide. This issue is fixed in version 3.2.1.