CVE-2026-31988
yauzl 3.2.0 - Denial of Service via Off-by-One Error in NTFS Timestamp Parser
- State
- Published
- Severity
- 6.9 Medium
- Published
- Mar 11, 2026
- Updated
- Mar 12, 2026
- Reserved
- Mar 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | VulnCheck |
Weaknesses
- CWE-193 Off-by-one Error
Affected Products
| Product | Versions |
|---|---|
yauzlthejoshwolfe |
|
References
- Patch Commitpatch
- CodeAnt AI Security Research Advisorythird-party-advisory
- npm - yauzlproduct
- VulnCheck Advisory: yauzl 3.2.0 - Denial of Service via Off-by-One Error in NTFS Timestamp Parserthird-party-advisory
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