Allocation of Resources Without Limits or Throttling Affecting adm-zip package, versions <0.5.18
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-ADMZIP-17954277
- published12 Jul 2026
- disclosed10 Jul 2026
- creditUnknown
Introduced: 10 Jul 2026
NewCVE-2026-39244 (opens in a new tab)How to fix?
Upgrade adm-zip to version 0.5.18 or higher.
Overview
adm-zip is a JavaScript implementation for zip data compression for NodeJS.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in zipEntry.js and entryHeader.js, which size a Buffer.alloc() call directly from the uncompressed-size field of a ZIP central directory header without validating it. An attacker can crash the process with an out-of-memory condition by supplying a small ZIP file, around 120 bytes, whose header declares a roughly 4 GB uncompressed size, triggering the oversized allocation before any CRC check.