What is CVE-2026-31938?

CVE-2026-31938 is a critical-severity vulnerability in Parallax Jspdf, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-03-18.

How severe is CVE-2026-31938?

Critical severity. CVSS v3 base score is 9.6 out of 10.

XSS in Parallax Jspdf

CVE-2026-31938

jsPDF is a library to generate PDFs in JavaScript. Prior to version 4.2.1, user control of the `options` argument of the `output` function allows attackers to inject arbitrary HTML (such as scripts) into the browser context the created PDF…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (16.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L.

Affected products

Parallax Jspdf — versions < 4.2.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/parallax/jsPDF/security/advisories/GHSA-wfv2-pwc8-crg5 (x_refsource_CONFIRM)
https://github.com/parallax/jsPDF/commit/87a40bbd07e6b30575196370670b41f264aa78d7 (x_refsource_MISC)
https://github.com/parallax/jsPDF/releases/tag/v4.2.1 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-31938?: CVE-2026-31938 is a critical-severity vulnerability in Parallax Jspdf, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-03-18.
How severe is CVE-2026-31938?: Critical severity. CVSS v3 base score is 9.6 out of 10.