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TI-2018-09011 Aliases CVE-2018-12556GHSA-8mxx-g9vw-r875

The signature verification routine in install.sh in yarnpkg/website through 2018-06-05…

Priority LOW 30CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-347.

Summary

The signature verification routine in install.sh in yarnpkg/website through 2018-06-05 only verifies that the yarn release is signed by any (arbitrary) key in the local keyring of the user, and does not pin the signature to the yarn release key, which allows remote attackers to sign tampered yarn release packages with their own key.

Why it matters now

EPSS 0.01775 78th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:yarnpkg:website:*:*:*:*:*:*:*:*up to 2018-06-05Vulnerableyarnpkg
  • cpe:2.3:a:yarnpkg:website:*:*:*:*:*:*:*:* Versions up to 2018-06-05 Vulnerable ·yarnpkg

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-12556
  2. 2026-10-03 Alias added: GHSA-8mxx-g9vw-r875

References

Advisory 6

Sources

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