CVE-2026-40931

HIGH

8.4

Description

Compressing is a compressing and uncompressing lib for node. Prior to 2.1.1 and 1.10.5, the patch for CVE-2026-24884 relies on a purely logical string validation within the isPathWithinParent utility. This check verifies if a resolved path string starts with the destination directory string but fails to account for the actual filesystem state. By exploiting this "Logical vs. Physical" divergence, an attacker can bypass the security check using a Directory Poisoning technique (pre-existing symbolic links). This vulnerability is fixed in 2.1.1 and 1.10.5.

CVE Details

CVSS v3.1 Score8.4

SeverityHIGH

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/21/2026

Last Modified4/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

node-modules:compressing

Weaknesses (CWE)

CWE-59

References

https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5(security-advisories@github.com)

https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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