Summary
Malware in pre-build binaries of bignum
Impact
bignum releases from v0.12.2 to v0.13.0 (inclusive) used node-pre-gyp to optionally download pre-built binary versions of the addon. These binaries were published on a now-expired S3 bucket which has since been claimed by a malicious third party which is now serving binaries containing malware that exfiltrates data from the user's computer.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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v0.13.1 does not use node-pre-gyp and does not have support for downloading pre-built binaries in any form, avoiding the risk of malicious downloads.
Frequently Asked Questions
- What is GHSA-7CGC-FJV4-52X6? GHSA-7CGC-FJV4-52X6 is a critical-severity security vulnerability in bignum (npm), affecting versions >= 0.12.2, < 0.13.1. It is fixed in 0.13.1.
- Which versions of bignum are affected by GHSA-7CGC-FJV4-52X6? bignum (npm) versions >= 0.12.2, < 0.13.1 is affected.
- Is there a fix for GHSA-7CGC-FJV4-52X6? Yes. GHSA-7CGC-FJV4-52X6 is fixed in 0.13.1. Upgrade to this version or later.
- Is GHSA-7CGC-FJV4-52X6 exploitable, and should I be worried? Whether GHSA-7CGC-FJV4-52X6 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-7CGC-FJV4-52X6 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-7CGC-FJV4-52X6? Upgrade
bignumto 0.13.1 or later.