XSS in Vega

CVE-2023-26486

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. The Vega `scale` expression function has the ability to call arbitrary functions with a single controlled argument. The scale expression function passes a user supplied argument group to getScale, which is then used as if it were an internal context. The context.scales[name].value is accessed from group and called as a function back in scale. This can be exploited to escape the Vega expression sandbox in order to execute arbitrary JavaScript. This issue has been fixed in version 5.13.1.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.008 (52.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2023-26486?
CVE-2023-26486 is a medium-severity vulnerability in Vega, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2023-03-04.
How severe is CVE-2023-26486?
Medium severity. CVSS v3 base score is 6.5 out of 10.