What is CVE-2026-40931?

CVE-2026-40931 is a high-severity vulnerability in Node-modules Compressing, classified under Improper Link Resolution Before File Access. CVSS score: 8.4/10. Published 2026-04-21.

How severe is CVE-2026-40931?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in Node-modules Compressing

CVE-2026-40931

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…

EPSS: 0.000 (6.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Node-modules Compressing — versions >=2.0.0, < 2.1.1, < 1.10.5

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

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

Frequently asked questions

What is CVE-2026-40931?: CVE-2026-40931 is a high-severity vulnerability in Node-modules Compressing, classified under Improper Link Resolution Before File Access. CVSS score: 8.4/10. Published 2026-04-21.
How severe is CVE-2026-40931?: High severity. CVSS v3 base score is 8.4 out of 10.