CVE-2026-48758 sigstore-js: DSSE payloadType type-binding failure

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...

CVE-2026-48758

CVE-2026-48758 affects sigstore-js with a flaw in the preAuthEncoding function in @sigstore/core: it uses Node.js ASCII encoding when converting PAE strings to bytes, allowing payloadType to be mutated after signing without invalidating the DSSE signature. The issue is fixed in @sigstore/core ver...

GHSA-JFC7-64V2-MR8C @sigstore/core has DSSE payloadType type-binding failure

Impact The preAuthEncoding function in @sigstore/core uses Node.js 'ascii' encoding when converting the PAE Pre-Authentication Encoding string to bytes. This allows payloadType to be mutated after signing without invalidating the signature, breaking the type-binding guarantee that DSSE is designe...

PT-2026-53015

Name of the Vulnerable Software and Affected Versions sigstore-js versions prior to 3.2.1 Description The preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the Pre-Authentication Encoding PAE string to bytes. Because ascii encoding in Node.js truncates...