CVE CVE-2026-48758

CVE-2026-48758

Node.js

Severity: MEDIUM
CVSS: 5.4CVSS
Published: 2026-07-14
Last modified: 2026-07-14
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CWE: CWE-347

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.

References

https://github.com/sigstore/sigstore-js/commit/b5aa4f1f8d2db0a9dfa6430fb114d9c2f1c304f7
https://github.com/sigstore/sigstore-js/pull/1657
https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fcore%403.2.1
https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c

Summary

Description

References