Summary
Signatures are mistakenly recognized to be valid in jsrsasign
In the jsrsasign package through 10.1.13 for Node.js, some invalid RSA PKCS#1 v1.5 signatures are mistakenly recognized to be valid. NOTE: there is no known practical attack.
Impact
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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Frequently Asked Questions
- What is GHSA-H87Q-G2WP-47PJ? GHSA-H87Q-G2WP-47PJ is a medium-severity security vulnerability in jsrsasign (npm), affecting versions < 10.2.0. It is fixed in 10.2.0.
- Which versions of jsrsasign are affected by GHSA-H87Q-G2WP-47PJ? jsrsasign (npm) versions < 10.2.0 is affected.
- Is there a fix for GHSA-H87Q-G2WP-47PJ? Yes. GHSA-H87Q-G2WP-47PJ is fixed in 10.2.0. Upgrade to this version or later.
- Is GHSA-H87Q-G2WP-47PJ exploitable, and should I be worried? Whether GHSA-H87Q-G2WP-47PJ 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-H87Q-G2WP-47PJ 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-H87Q-G2WP-47PJ? Upgrade
jsrsasignto 10.2.0 or later.