# vega-expression (npm) vulnerabilities

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 6.2.2 (Aug 14, 2026): no advisory affects it
- Newest unaffected release: 6.2.2 (Aug 14, 2026), the latest release
- Weekly downloads: 2.8M
- Dependents: 283
- Releases: 41 since 1.0.0 (Jul 12, 2015)
- Registry: https://www.npmjs.com/package/vega-expression
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2025-59840: 1.0.0 to 5.2.0 (5.2.1 is outside it); 6.0.0 (6.1.0 is outside it)

## Advisories (1)

### [CVE-2025-59840](https://cve.now/CVE-2025-59840): Vega Cross-Site Scripting (XSS) via expressions abusing toString calls in environments using the VEGA\_DEBUG global variable

- Severity: High 8.1
- Published: Nov 13, 2025
- Affected: from 6.0.0, fixed in 6.1.0; fixed in 5.2.1.
- Fixed in 5.2.1 (released Oct 23, 2025, 21 days before disclosure) and 6.1.0 (released Sep 16, 2025, 58 days before disclosure).
- The latest release, 6.2.2, is not affected.
- 19% of vega-expression downloads last week were affected versions (578.1K).

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