CVE-2018-12556
5.9 · MEDIUMOverview
CVE-2018-12556 is a medium-severity vulnerability affecting yarnpkg website. It was published on May 16, 2019 and has a CVSS 3.0 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from yarnpkg. Update website to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| yarnpkg | website | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2018-12556?
CVE-2018-12556 is a medium-severity vulnerability affecting yarnpkg website. It was published on May 16, 2019 and has a CVSS 3.0 base score of 5.9 (MEDIUM).
How severe is CVE-2018-12556?
This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-12556?
Check the references section for vendor advisories and patches from yarnpkg. Update website to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-12556?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-12556 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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