parallax jsPDF up to 4.2.0 API createAnnotation Color escape output

Summaryinfo

A vulnerability described as critical has been identified in parallax jsPDF up to 4.2.0. Affected is the function createAnnotation of the component API. Such manipulation of the argument Color leads to escape output. This vulnerability is uniquely identified as CVE-2026-31898. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in parallax jsPDF up to 4.2.0 and classified as critical. Affected by this issue is the function createAnnotation of the component API. The manipulation of the argument color with an unknown input leads to a escape output vulnerability. Using CWE to declare the problem leads to CWE-116. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. Impacted is confidentiality, integrity, and availability. CVE summarizes:

jsPDF is a library to generate PDFs in JavaScript. Prior to version 4.2.1, user control of arguments of the `createAnnotation` method allows users to inject arbitrary PDF objects, such as JavaScript actions. If given the possibility to pass unsanitized input to the following method, a user can inject arbitrary PDF objects, such as JavaScript actions, which might trigger when the PDF is opened or interacted with the `createAnnotation`: `color` parameter. The vulnerability has been fixed in [email protected]. As a workaround, sanitize user input before passing it to the vulnerable API members.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-31898 since 03/09/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 4.2.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 4155c4819d5eca284168e51e0e1e81126b4f14b8 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.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• parallax

Name

• jsPDF

Version

• 4.0
• 4.1
• 4.2.0

License

• open-source

Website

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

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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