Vulnerability · Published Feb 2, 2026 · Assigned by GitHub_M
CVE-2026-24040jsPDF has a Shared State Race Condition in addJS Plugin
Medium 6.3
In plain English
A medium-severity race condition in jsPDF from parallax. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 jsPDF@4.1.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | jspdf | 4.1.0 | GHSA-cjw8-79x6-5cj4 |
Affected products (as reported)
Weakness: CWE-362 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/parallax/jsPDF/security/advisories/GHSA-cjw8-79x6-5cj4 x_refsource_CONFIRM
- https://github.com/parallax/jsPDF/commit/2863e5c26afef211a545e8c174ab4d5fce3b8c0e x_refsource_MISC
- https://github.com/parallax/jsPDF/releases/tag/v4.1.0 x_refsource_MISC