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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| GTERMARS | JavaScript::Minifier::XS | unaffected |
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Solution
Upgrade to JavaScript::Minifier::XS version 0.16 or later.
Workaround
No workaround given by the vendor.
Mon, 29 Jun 2026 21:30:00 +0000
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cvssV3_1
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Mon, 29 Jun 2026 20:15:00 +0000
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| 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. | |
| Title | JavaScript::Minifier::XS versions before 0.16 for Perl leak memory on every call to minify(), allowing unbounded memory growth | |
| Weaknesses | CWE-400 CWE-401 |
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| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-06-29T22:24:36.940Z
Reserved: 2026-06-18T11:27:09.117Z
Link: CVE-2026-56018
Vulnrichment
Updated: 2026-06-29T20:53:09.308Z
NVD
No data.
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-06-29T22:30:05Z