What’s Vulnerable › Vulnerabilities

CVE-2020-26296: XSS in Vega

• Severity: high (CVSS 8.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-30 · updated 2026-06-17
• Weakness: CWE-79

Description

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Vega in an npm package. In Vega before version 5.17.3 there is an XSS vulnerability in Vega expressions. Through a specially crafted Vega expression, an attacker could execute arbitrary javascript on a victim's machine. This is fixed in version 5.17.3

Affected products

• vega: before 5.17.3 — fixed in 5.17.3

How to fix

Upgrade to a fixed version: vega 5.17.3. Check the vendor advisory for mitigations.

References

• https://github.com/vega/vega/issues/3018
• https://github.com/vega/vega/pull/3019
• https://github.com/vega/vega/releases/tag/v5.17.3
• https://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54
• https://www.npmjs.com/package/vega
• https://github.com/vega/vega/issues/3018
• https://github.com/vega/vega/pull/3019
• https://github.com/vega/vega/releases/tag/v5.17.3
• https://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54
• https://www.npmjs.com/package/vega

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