Vulnerability Description
jsPDF is a library to generate PDFs in JavaScript. Prior to 4.1.0, the addJS method in the jspdf Node.js build utilizes a shared module-scoped variable (text) to store JavaScript content. When used in a concurrent environment (e.g., a Node.js web server), this variable is shared across all requests. If multiple requests generate PDFs simultaneously, the JavaScript content intended for one user may be overwritten by a subsequent request before the document is generated. This results in Cross-User Data Leakage, where the PDF generated for User A contains the JavaScript payload (and any embedded sensitive data) intended for User B. Typically, this only affects server-side environments, although the same race conditions might occur if jsPDF runs client-side. The vulnerability has been fixed in [email protected].
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parall | Jspdf | < 4.1.0 |
Related Weaknesses (CWE)
References
- https://github.com/parallax/jsPDF/commit/2863e5c26afef211a545e8c174ab4d5fce3b8c0Patch
- https://github.com/parallax/jsPDF/releases/tag/v4.1.0Release Notes
- https://github.com/parallax/jsPDF/security/advisories/GHSA-cjw8-79x6-5cj4Vendor AdvisoryExploit
FAQ
What is CVE-2026-24040?
CVE-2026-24040 is a vulnerability with a CVSS score of 4.8 (MEDIUM). jsPDF is a library to generate PDFs in JavaScript. Prior to 4.1.0, the addJS method in the jspdf Node.js build utilizes a shared module-scoped variable (text) to store JavaScript content. When used in...
How severe is CVE-2026-24040?
CVE-2026-24040 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-24040?
Check the references section above for vendor advisories and patch information. Affected products include: Parall Jspdf.