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Critical severityNVD Advisory· Published Mar 18, 2026· Updated Mar 18, 2026

jsPDF has HTML Injection in New Window paths

CVE-2026-31938

Description

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 is opened in. The vulnerability can be exploited in the following scenario: the attacker provides values for the output options, for example via a web interface. These values are then passed unsanitized (automatically or semi-automatically) to the attack victim. The victim creates and opens a PDF with the attack vector using one of the vulnerable method overloads inside their browser. The attacker can thus inject scripts that run in the victims browser context and can extract or modify secrets from this context. The vulnerability has been fixed in jspdf@4.2.1. As a workaround, sanitize user input before passing it to the output method.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
jspdfnpm
< 4.2.14.2.1

Affected products

59

Patches

Vulnerability mechanics

References

5

News mentions

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