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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-56018 Detail

Description

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 allocated in JsSetNodeContents; JsDiscardNode unlinks nodes without freeing their contents. Each token's contents buffer is therefore leaked on every call, and the two early returns taken when the node list is empty leak the whole NodeSet. A long-lived process that minifies repeatedly, such as an asset pipeline or a server-side minifier endpoint, grows in memory without bound until it exhausts available memory and is killed, causing denial of service.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2026/06/29/17 CVE
https://github.com/bleargh45/JavaScript-Minifier-XS/issues/10 CPANSec
https://metacpan.org/release/GTERMARS/JavaScript-Minifier-XS-0.16/changes CPANSec

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption CPANSec  
CWE-401 Missing Release of Memory after Effective Lifetime CPANSec  

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-56018
NVD Published Date:
06/29/2026
NVD Last Modified:
06/29/2026
Source:
CPANSec