CVE-2026-31988CWE-193

yauzl 3.2.0 - Denial of Service via Off-by-One Error in NTFS Timestamp Parser

Medium · published March 11, 2026

CVSS v4.0
6.9
EPSS
1%
Percentile
51.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00669 · 51.4th percentile
Weakness
CWE-193 · Off-by-one Error
Published
2026-03-11T22:58Z
EPSS history
Timeline
  • 11 MAR 22:58Z
    yauzl 3.2.0 - Denial of Service via Off-by-One Error in NTFS Timestamp Parser
    cvelistv5