CVE-2026-24040: jsPDF has a Shared State Race Condition in addJS Plugin

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-02 · updated 2026-06-17
Weakness: CWE-362

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 products

parallax jsPDF: before 4.1.0 — fixed in 4.1.0

How to fix

Upgrade to a fixed version: parallax jsPDF 4.1.0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-24040 or the next vulnerability affects your stack