Incorrect Behavior Order Affecting adm-zip package, versions <0.6.1
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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Test your applications- Snyk IDSNYK-JS-ADMZIP-20335412
- published30 Sept 2026
- disclosed29 Sept 2026
- creditEzinne Kalu
Introduced: 29 Sep 2026
NewCVE-2026-114104 (opens in a new tab)How to fix?
Upgrade adm-zip to version 0.6.1 or higher.
Overview
adm-zip is a JavaScript implementation for zip data compression for NodeJS.
Affected versions of this package are vulnerable to Incorrect Behavior Order via duplicate entry names in a ZIP archive processed by zipFile.js. Because adm-zip stores all entries in entryList (used by extractAllTo()) but only the last occurrence of a name in entryTable (used by getEntry()), an attacker can supply an archive containing two entries with the same name. An application that validates entry content by calling getEntry() before extracting will inspect one file, while extractAllTo() writes a different file to disk, allowing the attacker to bypass content validation and land arbitrary content on the filesystem.