This vulnerability allows user control of the first argument of the addImage method in jsPDF, a library to generate PDFs in JavaScript. Prior to version 4.1.0, if a user can provide unsanitized image data or URLs to the addImage method, they can pass a harmful BMP file that leads to out of memory errors and denial of service. This issue arises from the large width and/or height entries in BMP file headers, causing excessive memory allocation. The html method is also affected. The vulnerability has been fixed in jsPDF version 4.1.0.
With a CVSS score of 8.7, this vulnerability is classified as high severity, indicating a significant risk to organizations. The attack vector is network-based and has a low complexity, making it easier for attackers to exploit the vulnerability without requiring any privileges or user interaction. The potential impact on availability is high, necessitating urgent attention from security teams.
Organizations should prioritize patching immediately to prevent disruptions caused by this denial of service vulnerability. The risk of exploitation underscores the importance of monitoring and securing applications that utilize the jsPDF library.
The vulnerability was published on February 2, 2026, and it affects all versions of jsPDF prior to 4.1.0. Security teams should assess their use of the library and apply the necessary patches.
Vulnerability Details
jsPDF is a widely used library for generating PDF documents in JavaScript. The vulnerability can be exploited through the addImage method, allowing attackers to control image data input. This results in a crash due to memory exhaustion when processing malformed BMP files. The official description of the vulnerability clarifies the risks associated with unvalidated inputs.
The CWE classification for this vulnerability is CWE-770, indicating improper handling of inputs leading to denial of service. The vulnerability was addressed and patched in version 4.1.0 of jsPDF.
Technical Analysis
The root cause of this vulnerability lies in the handling of image inputs in the addImage method. Attackers may leverage this vulnerability to pass unvalidated BMP files with excessive dimensions, leading to resource exhaustion and service disruption.
The attack vector is network-based, allowing an attacker to send malicious requests without requiring direct access to the system. The complexity of the attack is low, and no privileges or user interaction are needed, making it particularly concerning for applications that use jsPDF.
The vulnerability has a high impact on availability, as it can cause the application to crash due to memory allocation issues. There is no impact on confidentiality or integrity, but the denial of service risk is significant.
Risk & Impact Analysis
Risk to organizations includes potential downtime and service interruptions due to denial of service attacks leveraging malformed BMP files. The ability to crash the service without requiring user authentication or privileges poses a significant threat, particularly for web applications that rely on jsPDF for document generation.
The blast radius for this vulnerability is extensive, as many applications may utilize the jsPDF library to generate PDFs. Organizations should assess their exposure and prioritize remediation efforts based on their risk tolerance and operational environment.
Given the CVSS score of 8.7, organizations should address this vulnerability in their priority patch cycle. Effective vulnerability management strategies should include timely updates and continuous monitoring for potential exploitation attempts.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of jsPDF prior to 4.1.0 are affected by this vulnerability. Organizations should ensure they are updated to the latest version to mitigate the risks associated with this denial of service vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should update to jsPDF version 4.1.0 or later. If immediate patching is not possible, consider implementing input validation to sanitize image data and URLs passed to the addImage method. Additionally, monitoring for anomalous behavior related to PDF generation can help detect potential exploitation attempts.
For best practices in vulnerability management, organizations can refer to resources such as the penetration testing services offered by AppSecure.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual memory consumption and service interruptions during PDF generation. Behavioral anomalies in application performance may indicate attempts to exploit the denial of service vulnerability.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing risks associated with input handling in libraries that process user-generated content. Security teams should remain vigilant and ensure that libraries like jsPDF are regularly updated to mitigate similar vulnerabilities.
For continuous improvement in application security, organizations can implement practices outlined in the penetration testing methodology and ensure compliance with industry standards by engaging in vulnerability management programs to systematically address vulnerabilities.
Organizations should also consider the value of web application penetration testing to identify and mitigate similar weaknesses in their applications.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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