CVE-2025-66648

`vega-functions` vulnerable to Cross-site Scripting via `setdata` function

State: Published
Severity: 7.2 High
Published: Jan 5, 2026
Updated: Jan 6, 2026
Reserved: Dec 5, 2025

Description

vega-functions provides function implementations for the Vega expression language. Prior to version 6.1.1, for sites that allow users to supply untrusted user input, malicious use of an internal function (not part of the public API) could be used to run unintentional javascript (XSS). This issue is fixed in vega-functions `6.1.1`. There is no workaround besides upgrading. Using `vega.expressionInterpreter` as described in CSP safe mode does not prevent this issue.

Scores

CVSS	Score	Vector	Source
3.1	7.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
vegavega	< 6.1.1Affected

References

https://github.com/vega/vega/security/advisories/GHSA-m9rg-mr6g-75gm

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