Off-by-one Error Affecting librechat package, versions <0.8.4-r3


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.14% (35th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LIBRECHAT-16077996
  • published16 Apr 2026
  • disclosed11 Mar 2026

Introduced: 11 Mar 2026

CVE-2026-31988  (opens in a new tab)
CWE-193  (opens in a new tab)

How to fix?

Upgrade Chainguard librechat to version 0.8.4-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream librechat package and not the librechat package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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 Base Scores

version 3.1