Prototype Pollution in sheetJS
All versions of SheetJS CE through 0.19.2 are vulnerable to "Prototype Pollution" when reading specially crafted files. Workflows that do not read arbitrary files (for example, exporting data to spreadsheet files) are unaffected.
A non-vulnerable version cannot be found via npm, as the repository hosted on GitHub and the npm package xlsx are no longer maintained. Version 0.19.3 can be downloaded via https://cdn.sheetjs.com/.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | xlsx | all versions | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-30533
- https://cdn.sheetjs.com
- https://cdn.sheetjs.com/advisories/CVE-2023-30533
- https://git.sheetjs.com/sheetjs/sheetjs
- https://git.sheetjs.com/sheetjs/sheetjs/issues/2667
- https://git.sheetjs.com/sheetjs/sheetjs/issues/2986
- https://git.sheetjs.com/sheetjs/sheetjs/src/branch/master/CHANGELOG.md
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-1321- Platform
- npm
- Package
xlsx- Disclosed
- 24.04.2023
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4r6h-8v6p-xvw6 - CC BY 4.0
Vulnerability history: xlsx
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
- 5
- First → latest
- 07.2021 04.2024
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 3
Disclosures per year
- 2021: 3
- 2022: 0
- 2023: 1
- 2024: 1
- 2025: 0
- 2026: 0
-
Prototype Pollution in sheetJS this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.