What is CVE-2026-120988?

CVE-2026-120988 is a medium-severity vulnerability, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-11-03.

How severe is CVE-2026-120988?

Medium severity. CVSS v3 base score is 6.1 out of 10.

CVE-2026-120988

CVE-2026-120988

billboard.js before 4.1.3 allows an attacker to execute malicious JavaScript due to improper sanitization of series ids during legend template rendering.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-11-03 · last modified 2026-11-03.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (5.0th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-120988?: CVE-2026-120988 is a medium-severity vulnerability, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-11-03.
How severe is CVE-2026-120988?: Medium severity. CVSS v3 base score is 6.1 out of 10.