Vulnerable JavaScript Library Checker
Flag warning patterns in a pasted script list, with no CVE claims.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Vulnerable JavaScript Library Checker
How to use this tool
- Enter your values in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.
Worked example
jQuery 1.12.4 is flagged for its old major line pattern, while React 18.2.0 has no pattern flags.
What this tool does not do / Limits
This is a pattern check only. It holds no CVE, version or vulnerability database, cannot say whether a library is vulnerable, and must not be read as a security verdict. Check official sources for real vulnerability data.
Frequently asked questions
Does a flag mean the library is vulnerable?
No. A flag means only that a warning pattern was found. It is not a vulnerability claim.
Does a clean result mean the library is safe?
No. It means only that none of the listed patterns were found.
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