CVE-2026-31988

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/thejoshwolfe/yauzl/commit/c4695215b05c6adffda613b9051a2a85429b33fe
https://www.codeant.ai/security-research/yauzl-denial-of-service-zip-file-crash
https://www.npmjs.com/package/yauzl
https://www.vulncheck.com/advisories/yauzl-denial-of-service-via-off-by-one-error-in-ntfs-timestamp-parser
https://www.codeant.ai/security-research/yauzl-denial-of-service-zip-file-crash

Configurations

No configuration.

History

No history.

Information

Published : 2026-03-11 23:16

Updated : 2026-03-12 21:07

NVD link : CVE-2026-31988

Mitre link : CVE-2026-31988

CVE.ORG link : CVE-2026-31988

JSON object : View

Products Affected

No product.

CWE

CWE-193

Off-by-one Error

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