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CVE-2026-59891

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

Published: Jul 14, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-522
9.6CRITICAL
NVD MITRE
EPSS Score
0.3%
Top 75.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-522

Affected Products

sigstore
oss-projectaka gitsign, cosign, rekor
sigstore-jsOn-prem
Security Products / pki-crypto

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Credential Access
View detailed technique mapping

References

https://github.com/sigstore/sigstore-js/security/advisories/GHSA-pf56-329r-95rw
github.com
https://github.com/sigstore/sigstore-js/commit/85c58380758b97ce1b74ef470e55cc21f9d3aa89
github.com
https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Foci%400.7.1
github.com

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