by Kastro
Paper/Archive/CVE-2026-59891

CVE-2026-59891

sigstore sigstore-js — Credential confusion in  @sigstore/oci  can leak registry credentials to an attacker-controlled registry

EPSS 0.5%CVSS 9.6
critical.is priorityof 100
37
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 40.9.409 × 208.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.1, getRegistryCredentials() reads credentials from the Docker config file and selects an entry by checking whether any configured auth key contains the target registry string. Because this is a substring match rather than an exact host match, credentials configured for one registry can be selected for and transmitted to a different registry whose hostname has a substring relationship with a configured auth key. This issue is fixed in version 0.7.1.

Affected

ProductAffectedFixed inSource
sigstore-js< 0.7.1–CNA

Scores by source

GitHub_M (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/sigstore/sigstore-js/security/advisories/GHSA-pf56-329r-95rwrefgithub.com/sigstore/sigstore-js/commit/85c58380758b97ce1b74ef470e55cc21f9d3aa89refgithub.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Foci%400.7.1