CVE-2026-25940 is a high-severity vulnerability affecting the jsPDF library, a popular tool for generating PDFs in JavaScript. This vulnerability allows user control of properties and methods of the Acroform module to inject arbitrary PDF objects, including JavaScript actions that are executed when a victim interacts with the radio options. The vulnerability affects all versions prior to 4.2.0, which has since been patched. Organizations using jsPDF should sanitize user input prior to passing it to the vulnerable API members.
The CVSS score for this vulnerability is 8.1, indicating a high severity level. This is primarily due to the potential for high confidentiality and integrity impact, as attackers may leverage this vulnerability to execute arbitrary JavaScript in the context of the affected application. Given its remote exploitation potential and low attack complexity, organizations should prioritize patching immediately.
The vulnerability was published on February 19, 2026, and has been confirmed to be analyzed. The urgency for defenders to address this issue is high due to the exploitability of the vulnerability, which has been indicated by a successful proof-of-concept (PoC) found on GitHub. Organizations should ensure they have updated to jsPDF version 4.2.0 or later to mitigate this risk.
With the increasing reliance on JavaScript libraries for PDF generation, vulnerabilities like CVE-2026-25940 highlight the importance of secure coding practices, including input validation and sanitization. Failure to implement these measures can lead to significant security risks for organizations.
Vulnerability Details
This vulnerability allows user control of properties and methods of the Acroform module, specifically allowing the injection of arbitrary PDF objects such as JavaScript actions. The vulnerability has been fixed in jsPDF version 4.2.0. Organizations are advised to sanitize user input before passing it to the vulnerable API members.
The CVSS score for this vulnerability is 8.1, indicating a high severity level. The attack vector is network-based, requiring low complexity with no privileges required, but does necessitate user interaction. The impact on confidentiality and integrity is high, while availability remains unaffected.
This vulnerability is classified under CWE-116, which deals with improper encoding or escaping of output, leading to injection vulnerabilities.
Technical Analysis
The root cause of this vulnerability lies in the lack of proper input sanitization within the Acroform module of the jsPDF library. Attackers can exploit this flaw by crafting malicious inputs that are processed by the library, allowing for the execution of arbitrary JavaScript within the context of a victim's session.
The attack vector is network-based, meaning that an attacker can exploit this vulnerability remotely without physical access to the vulnerable system. The attack complexity is low, as it requires no privileges and only basic user interaction, such as hovering over a radio button.
Given the high potential impact on confidentiality and integrity, organizations should take immediate action to remediate this vulnerability. It is critical to implement input sanitization and validation to prevent injection attacks.
Risk & Impact Analysis
Organizations using jsPDF are at risk of having their applications compromised due to this vulnerability. Attackers may leverage this vulnerability to inject malicious scripts that could lead to unauthorized actions or data exposure. The potential blast radius is significant, as this could affect any user interacting with a compromised PDF document.
The urgency for organizations to address this vulnerability is underscored by its high CVSS score of 8.1 and the presence of a proof of concept. Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability and protect their users.
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of jsPDF prior to 4.2.0 are affected by this vulnerability. Organizations should ensure that they upgrade to version 4.2.0 or later to eliminate this risk.
Mitigation & Remediation
To mitigate the risks associated with this vulnerability, organizations should upgrade to jsPDF version 4.2.0 or later. Additionally, organizations must sanitize user inputs when interacting with the Acroform module to prevent potential injection attacks.
For a comprehensive approach, organizations may consider engaging in penetration testing to evaluate their security posture and identify any potential vulnerabilities.
Detection Guidance
Organizations should monitor logs for unusual activity that may indicate exploitation attempts, such as unexpected JavaScript execution in PDF documents. Behavioral anomalies in user interactions with PDFs, especially those generated by jsPDF, should also be investigated.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-25940 lies in its demonstration of the risks associated with JavaScript libraries. It represents a trend where simple libraries can introduce severe vulnerabilities if not properly secured. Security teams should learn from such incidents to enhance their security protocols and ensure that libraries are regularly updated and audited.
Organizations can benefit from adopting a proactive security strategy by implementing measures such as regular security audits and engaging in penetration testing methodology to identify potential weaknesses in their applications.
In conclusion, CVE-2026-25940 highlights critical vulnerabilities in widely used libraries like jsPDF and emphasizes the need for robust security measures across all development practices. Continuous monitoring and updating practices will help organizations maintain a strong security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)