GHSA-gmq8-994r-jv83MediumCVSS 5.3

yauzl contains an off-by-one error

Published
March 12, 2026
Last Modified
March 16, 2026

🔗 CVE IDs covered (1)

📋 Description

yauzl (aka Yet Another Unzip Library) version 3.2.0 for Node.js contains an off-by-one error in the NTFS extended timestamp extra field parser within the getLastModDate() function. The while loop condition checks cursor < data.length + 4 instead of cursor + 4 <= data.length, allowing readUInt16LE() to read past the buffer boundary. A remote attacker can cause a denial of service (process crash via ERR_OUT_OF_RANGE exception) by sending a crafted zip file with a malformed NTFS extra field. This affects any Node.js application that processes zip file uploads and calls entry.getLastModDate() on parsed entries. Fixed in version 3.2.1.

🎯 Affected products1

  • npm/yauzl:= 3.2.0

🔗 References (6)