CVE-2026-25755
Description
A flaw was found in jsPDF. The addJS method accepts user input without proper sanitization, allowing an attacker to inject arbitrary PDF objects into the document. A specially crafted payload that escapes the JavaScript string delimiter can execute malicious actions or alter the document structure, resulting in arbitrary code execution when a user opens a PDF with a viewer that supports embedded scripts.
Statement
To exploit this flaw, an attacker must be able to supply a specially crafted payload to the application using the addJS method and convince a user to open the generated PDF document with a viewer that supports embedded scripts. Due to these reasons, this vulnerability has been rated with an important severity.
Mitigation
To mitigate this vulnerability, sanitize the user-provided JavaScript code before passing it to the addJS method by strictly escaping backslashes and parentheses. Additionally, do not open PDF documents from untrusted sources.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 9.6 | 8.8 | 9.6 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | None | None | None |
| User Interaction | Required | Required | Required |
| Scope | Changed | Unchanged | Changed |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Red Hat CVSS v3 Score Explanation
This issue does not cause any impact to the application using the jsPDF library but it allows the generation of a specially crafted PDF file that can execute JavaScript code when a user opens it. To reflect this condition, the scope metric is set to changed.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
In some cases, injectable code controls authentication; this may lead to a remote vulnerability.
Access Control
Technical Impact: Gain Privileges or Assume Identity
Injected code can access resources that the attacker is directly prevented from accessing.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
When a product allows a user's input to contain code syntax, it might be possible for an attacker to craft the code in such a way that it will alter the intended control flow of the product. As a result, code injection can often result in the execution of arbitrary code. Code injection attacks can also lead to loss of data integrity in nearly all cases, since the control-plane data injected is always incidental to data recall or writing.
Non-Repudiation
Technical Impact: Hide Activities
Often the actions performed by injected control code are unlogged.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
