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Case File

CVE-2018-12556

MEDIUM · CVSS 5.9 EPSS 1.77% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2019-05-16 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.9. Public exploit code or proof-of-concept references have been detected in its references. It may be remotely exploitable.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

External Security References

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2018-12556
Severity
MEDIUM
CVSS
5.9
EPSS
1.77%

Original NVD 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.

Related CVEs

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