parallax jsPDF up to 4.1.x addJS code injection

Summaryinfo

A vulnerability described as critical has been identified in parallax jsPDF up to 4.1.x. Affected by this vulnerability is the function addJS. Executing a manipulation can lead to code injection. This vulnerability appears as CVE-2026-25755. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in parallax jsPDF up to 4.1.x and classified as critical. This vulnerability affects the function addJS. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

jsPDF is a library to generate PDFs in JavaScript. Prior to 4.2.0, user control of the argument of the `addJS` method allows an attacker to inject arbitrary PDF objects into the generated document. By crafting a payload that escapes the JavaScript string delimiter, an attacker can execute malicious actions or alter the document structure, impacting any user who opens the generated PDF. The vulnerability has been fixed in [email protected]. As a workaround, escape parentheses in user-provided JavaScript code before passing them to the `addJS` method.

The advisory is available at github.com. This vulnerability was named CVE-2026-25755 since 02/05/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 4.2.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 56b46d45b052346f5995b005a34af5dcdddd5437 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• parallax

Name

• jsPDF

Version

• 4.0
• 4.1

License

• open-source

Website

• Product: https://github.com/parallax/jsPDF/

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