Race Condition Affecting jspdf package, versions <4.1.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-JSPDF-15182647
- published3 Feb 2026
- disclosed2 Feb 2026
- creditKarimTantawey
Introduced: 2 Feb 2026
NewCVE-2026-24040 (opens in a new tab)How to fix?
Upgrade jspdf to version 4.1.0 or higher.
Overview
jspdf is a PDF Document creation from JavaScript
Affected versions of this package are vulnerable to Race Condition in the addJS function due to the use of a shared module-scoped variable for storing JavaScript content. An attacker can cause sensitive data intended for one user to be included in another user's PDF by making concurrent requests that exploit the shared state.
Note: This is only exploitable when used in a concurrent environment, e.g., on a Node.js web server.
Workaround
This vulnerability can be mitigated by avoiding the use of the addJS method in concurrent server-side environments or by ensuring requests are processed sequentially, such as with a queue.