CVE-2020-26296

XSS in Vega

HIGH
8.7
CVSS Score
Published: December 30, 2020 at 11:10 PM UTC
Updated: June 17, 2026 at 03:08 AM UTC
1 product affected across 1 vendorVega

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Severity
HIGH8.7
Exploit prediction
EPSS 2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.17.3
Affected range stops below 5.17.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

x_refsource_MISCThird Party Advisory
https://github.com/vega/vega/issues/3018
x_refsource_MISCThird Party Advisory
https://github.com/vega/vega/pull/3019
x_refsource_MISCRelease NotesThird Party Advisory
https://github.com/vega/vega/releases/tag/v5.17.3
x_refsource_MISCThird Party Advisory
https://www.npmjs.com/package/vega

CVSS

8.7HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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