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Vulnerability record · CVE-2020-26296 · published 30 December 2020

CVE-2020-26296: Vega project vega cross-site scripting vulnerability

Vega Project · Vega

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

8.7 CVSS 3.1 High EPSS 1.7% · top 23.5% CWE-79 · Cross-site scripting
8.7CVSS 3.1 base score, v2 3.5
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

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

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/vega/vega/issues/3018 Third Party Advisory
https://github.com/vega/vega/pull/3019 Third Party Advisory
https://github.com/vega/vega/releases/tag/v5.17.3 Release NotesThird Party Advisory
https://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54 Third Party Advisory
https://www.npmjs.com/package/vega Third Party Advisory
https://github.com/vega/vega/issues/3018 Third Party Advisory
https://github.com/vega/vega/pull/3019 Third Party Advisory
https://github.com/vega/vega/releases/tag/v5.17.3 Release NotesThird Party Advisory
https://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54 Third Party Advisory
https://www.npmjs.com/package/vega Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-26296), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.