CVE catalog
CVE-2026-48758
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 str
- Severity
- Medium · CVSS 5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.24% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Npm | @sigstore/core | Not reported | 3.2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Npm | @sigstore/core | npm | Not reported | 3.2.1 | Not reported | GHSA-JFC7-64V2-MR8C | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
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]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-48758]
- [https://osv.dev/vulnerability/GHSA-jfc7-64v2-mr8c]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48758.json]
[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]