CVE-2026-48758
CVE-2026-48758 · sigstore-js: DSSE payloadType type-binding failure
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 5.4 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
sigstore-js
- Versions
- < 3.2.1: Affected
No fix published
@sigstore/core npm
- Affected ranges
- SEMVER: < 3.2.1
Update to 3.2.1
Original sources
- https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c
- https://github.com/sigstore/sigstore-js/pull/1657
- https://github.com/sigstore/sigstore-js/commit/b5aa4f1f8d2db0a9dfa6430fb114d9c2f1c304f7
- https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fcore%403.2.1
- https://nvd.nist.gov/vuln/detail/CVE-2026-48758