What is CVE-2026-56018?

CVE-2026-56018 is a high-severity vulnerability in Gtermars Javascript::minifier::xs, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-29.

How severe is CVE-2026-56018?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Gtermars Javascript::minifier::xs

CVE-2026-56018

JavaScript::Minifier::XS versions before 0.16 for Perl leak memory on every call to minify(), allowing unbounded memory growth. In JsMinify (XS.xs) the cleanup frees only the NodeSet structures and never the per-token contents buffers all…

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Gtermars Javascript::minifier::xs — versions 0

Weakness classification (CWE)

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (issue-tracking)
9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-56018?: CVE-2026-56018 is a high-severity vulnerability in Gtermars Javascript::minifier::xs, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-29.
How severe is CVE-2026-56018?: High severity. CVSS v3 base score is 7.5 out of 10.