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

Quick assessment

Affected
parallax jsPDF
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

jsPDF是Parallax开源的一款基于JavaScript的PDF文档生成库。 jsPDF 4.1.0之前版本存在竞争条件问题漏洞，该漏洞源于addJS方法使用共享的模块作用域变量，可能导致跨用户数据泄露。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

T1114 · Email Collection
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I. Basic Information for CVE-2026-24040

Vulnerability Information
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Vulnerability Title
jsPDF has a Shared State Race Condition in addJS Plugin
Source: CVE Program / CVE List V5
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 jsPDF@4.1.0.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
jsPDF 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
jsPDF是Parallax开源的一款基于JavaScript的PDF文档生成库。 jsPDF 4.1.0之前版本存在竞争条件问题漏洞，该漏洞源于addJS方法使用共享的模块作用域变量，可能导致跨用户数据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
parallax jsPDF < 4.1.0 -

II. Public POCs for CVE-2026-24040

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III. Intelligence Information for CVE-2026-24040

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Same Patch Batch · parallax · 2026-02-02 · 4 CVEs total

CVE-2026-24737 8.1 HIGH jsPDF has a PDF Injection in AcroFormChoiceField which allows Arbitrary JavaScript Executi
CVE-2026-24043 jsPDF Affected by Stored XMP Metadata Injection (Spoofing & Integrity Violation)
CVE-2026-24133 jsPDF Affected by Denial of Service (DoS) via Unvalidated BMP Dimensions in BMPDecoder

IV. Related Vulnerabilities

Same product: jsPDF
Same vendor: parallax
Same weakness: CWE-362

V. Comments for CVE-2026-24040

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