tarteaucitron.js allows prototype pollution via custom text injection
A vulnerability was identified in tarteaucitron.js, where the addOrUpdate function, used for applying custom texts, did not properly validate input. This allowed an attacker with direct access to the site's source code or a CMS plugin to manipulate JavaScript object prototypes, leading to potential security risks such as data corruption or unintended code execution.
Impact
An attacker with high privileges could exploit this vulnerability to:
- Modify object prototypes, affecting core JavaScript behavior,
- Cause application crashes or unexpected behavior,
- Potentially introduce further security vulnerabilities depending on the application's architecture.
Fix https://github.com/AmauriC/tarteaucitron.js/commit/74c354c413ee3f82dff97a15a0a43942887c2b5b
The issue was resolved by ensuring that user-controlled inputs cannot modify JavaScript object prototypes.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | tarteaucitronjs | < 1.20.1 | 1.20.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-1321- Platform
- npm
- Package
tarteaucitronjs- Disclosed
- 07.04.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4hwx-xcc5-2hfc - CC BY 4.0
Vulnerability history: tarteaucitronjs
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 07.2023 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 7
- Low 1
Disclosures per year
- 2023: 1
- 2024: 0
- 2025: 5
- 2026: 2
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