CVE-2026-31938

Описание

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.

A flaw was found in jsPDF, a JavaScript library for generating PDFs. A remote attacker can exploit this vulnerability by providing malicious input to the options argument of the output function. When a victim creates and opens a PDF using this unsanitized input, arbitrary HTML, including scripts, can be injected and executed within the victim's browser context. This Cross-Site Scripting (XSS) vulnerability allows the attacker to extract or modify sensitive information from the victim's browser.