CVE-2020-26296

Name: CVE-2020-26296
Creator: NVD / NIST
Published: 2020-12-30T23:15:15.233+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10EPSS 1.36%

Last modified Jun 17, 2026

CVE-2020-26296 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Vega in an npm package. EPSS estimates a 1.36% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1

8.7/10

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

EPSS Probability

1.36%

68.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Vega Project	Vega	< 5.17.3

References

https://github.com/vega/vega/issues/3018Third Party Advisory
https://github.com/vega/vega/pull/3019Third Party Advisory
https://github.com/vega/vega/releases/tag/v5.17.3Release Notes, Third Party Advisory
https://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54Third Party Advisory
https://www.npmjs.com/package/vegaThird Party Advisory
https://github.com/vega/vega/issues/3018Third Party Advisory
https://github.com/vega/vega/pull/3019Third Party Advisory
https://github.com/vega/vega/releases/tag/v5.17.3Release Notes, Third Party Advisory
https://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54Third Party Advisory
https://www.npmjs.com/package/vegaThird Party Advisory

Timeline

Published: Dec 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26296?

How severe is CVE-2020-26296?

CVE-2020-26296 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 1.36% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26296?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26296?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST