CVE-2026-31938
CriticalCVSS 9.6Exploitation Probability (EPSS)
Low risk18th percentile - higher than 18% of all known CVEs
Summary
The jsPDF library prior to version 4.2.1 is vulnerable to HTML injection (including scripts) via user control of the `options` argument in the `output` function. An attacker can supply malicious values that, when the PDF is generated and opened in the victim's browser, execute in the victim's browser context.
Risk Assessment
The risk involves potential theft or modification of sensitive data from the victim's browser context, which could lead to session compromise, credential leakage, or account takeover.
Recommendation
Immediately update the jsPDF library to version 4.2.1 or later. If an update is not possible, thoroughly sanitize user input before passing it to the `output` method.
Other vulnerabilities in jsPDF
See all- CVE-2026-31898High
jsPDF library prior to version 4.2.1 is vulnerable to injection of arbitrary PDF objects, including JavaScript actions, via the `color` parameter of the `createAnnotation` method. An attacker can exploit this to execute malicious code when the PDF is opened.
- CVE-2026-25940High
The jsPDF library prior to version 4.2.0 contains a vulnerability that allows injection of arbitrary PDF objects, including JavaScript actions, through control of Acroform module properties and methods. The attack can be triggered when the victim hovers over a radio option.
- CVE-2026-25755High
The jsPDF library prior to version 4.2.0 is vulnerable to injection of arbitrary PDF objects via user-controlled argument of the `addJS` method. An attacker can escape JavaScript string delimiters to alter document structure or execute malicious actions.
- CVE-2026-25535High
The jsPDF library prior to version 4.2.0 is vulnerable to a denial of service attack via user control of the first argument of the `addImage` method. Passing a malicious GIF file with large width/height headers causes excessive memory allocation and denial of service. The `html` method is also affected.
- CVE-2026-24737High
The jsPDF library prior to version 4.1.0 has a vulnerability that allows injection of arbitrary PDF objects, including JavaScript actions, through user control of Acroform module properties and methods. Attackers can exploit unsanitized input in methods such as AcroformChoiceField.addOption, AcroformChoiceField.setOptions, AcroFormCheckBox.appearanceState, and AcroFormRadioButton.appearanceState.
- CVE-2025-68428High
The jsPDF library prior to version 4.0.0 is vulnerable to local file inclusion and path traversal. An attacker can exploit the loadFile method, as well as addImage, html, and addFont, to read arbitrary files from the server's file system. The file contents are then embedded in generated PDF documents.
Original NVD description (English source)
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 [email protected]. As a workaround, sanitize user input before passing it to the output method.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS