jszip Vulnerable to Prototype Pollution
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | jszip | >= 3.0.0, < 3.7.0, < 2.7.0 | 3.7.0, 2.7.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-23413
- https://github.com/Stuk/jszip/pull/766
- https://github.com/Stuk/jszip/commit/22357494f424178cb416cdb7d93b26dd4f824b36
- https://github.com/Stuk/jszip
- https://github.com/Stuk/jszip/blob/master/lib/object.js%23L88
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1251499
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1251498
- https://snyk.io/vuln/SNYK-JS-JSZIP-1251497
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-1321- Platform
- npm
- Package
jszip- Disclosed
- 10.08.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-jg8v-48h5-wgxg - CC BY 4.0
Vulnerability history: jszip
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
- 2
- First → latest
- 08.2021 01.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2021: 1
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 0
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