GHSA-WRW9-M778-G6MC

Memory Exposure in bl

Versions of bl before 0.9.5 and 1.0.1 are vulnerable to memory exposure.

bl.append(number) in the affected bl versions passes a number to Buffer constructor, appending a chunk of uninitialized memory

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Update to version 0.9.5, 1.0.1 or later.

1. What is GHSA-WRW9-M778-G6MC? GHSA-WRW9-M778-G6MC is a medium-severity security vulnerability in bl (npm), affecting versions < 0.9.5. It is fixed in 0.9.5, 1.0.1.
2. Which versions of bl are affected by GHSA-WRW9-M778-G6MC? bl (npm) versions < 0.9.5 is affected.
3. Is there a fix for GHSA-WRW9-M778-G6MC? Yes. GHSA-WRW9-M778-G6MC is fixed in 0.9.5, 1.0.1. Upgrade to this version or later.
4. Is GHSA-WRW9-M778-G6MC exploitable, and should I be worried? Whether GHSA-WRW9-M778-G6MC 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
5. What actually determines whether GHSA-WRW9-M778-G6MC 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.
6. How do I fix GHSA-WRW9-M778-G6MC?
   • Upgrade bl to 0.9.5 or later
   • Upgrade bl to 1.0.1 or later

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