TI-2026-42705 Aliases CVE-2026-59891 GHSA-pf56-329r-95rw

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

MEDIUM 43CWE-522Published 2026-07-14 · Updated 2026-07-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-522.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00473 41st percentileScored 2026-11-08

Fix Fixed sigstore-js (sigstore): 0.7.1@sigstore/oci (npm): 0.7.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
sigstore	sigstore-js	before 0.7.1	0.7.1	Patch available	CNA
—	@sigstore/oci (npm)	before 0.7.1	0.7.1	Patch available	GHSA-pf56-329r-95rw

sigstore-js Vendorsigstore Affected before 0.7.1 Fixed in 0.7.1 Patch available CNA
@sigstore/oci (npm) Vendor— Affected before 0.7.1 Fixed in 0.7.1 Patch available GHSA-pf56-329r-95rw

Remediation

Fix · CNA sigstore-js (sigstore) Fixed in 0.7.1
Fix · GHSA-pf56-329r-95rw @sigstore/oci (npm) Fixed in 0.7.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-59891
2026-10-03 Alias added: GHSA-pf56-329r-95rw

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-59891

Other 4

TI-2022-16356 False positive signature verification in cosign CVSS 3.1CRITICAL 9.8
TI-2026-36084 sigstore-js: `certificateOIDs` verification constraints are silently dropped and never enforced CVSS 3.1HIGH 7.5
TI-2024-19670 Cosign vulnerable to machine-wide denial of service via malicious artifacts CVSS 3.1HIGH 7.5
TI-2026-18290 Fulcio vulnerable to Server-Side Request Forgery (SSRF) via MetaIssuer Regex Bypass CVSS 3.1MEDIUM 5.8
TI-2026-36085 sigstore-js: Insufficient Verification of Data Authenticity CVSS 3.1MEDIUM 6.5
TI-2024-19669 Cosign vulnerable to system-wide denial of service via malicious attachments CVSS 3.1MEDIUM 5.9

See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences