← Vulnerability feed

Vulnerability record · CVE-2026-40931 · published 21 April 2026

CVE-2026-40931: Node-modules compressing link following vulnerability

Node Modules · Compressing

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.

7.8 CVSS 3.1 High EPSS 0.22% · top 88.5% CWE-59 · Link following
7.8CVSS 3.1 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5 ExploitMitigationVendor Advisory
https://github.com/node-modules/compressing/security/advisories/GHSA-4c3q-x735-j3r5 ExploitMitigationVendor Advisory

Track CVE-2026-40931 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2026-24884Node-modules compressing link following vulnerabilityCompressing is a compressing and uncompressing lib for node. In version 2.0.0 and 1.10.3 and prior, Compressing extracts TAR archives while restoring…EPSS 0.35%7.8CVE-2026-81963Windows Update Stack link-following privilege escalationWindows Update Stack resolves links improperly before accessing files, a link-following flaw (CWE-59) compounded by improper access control (CWE-284)…KEVEPSS 0.39%analysed7.8CVE-2015-5287ABRT abrt-hook-ccpp symlink privilege escalationThe abrt-hook-ccpp helper in Red Hat's Automatic Bug Reporting Tool (ABRT) before 2.7.1 follows symlinks on files with predictable names, letting a l…KEVEPSS 5.0%analysed7.8CVE-2026-41091Microsoft Defender link following allows local privilege elevationMicrosoft Defender's malware protection engine resolves links improperly before accessing files, a link-following flaw (CWE-59). A local attacker wit…KEVEPSS 0.44%analysed7.2CVE-2024-57728SimpleHelp zip slip path traversal allows arbitrary file write and code executionSimpleHelp remote support software v5.5.7 and earlier lets admin users upload a crafted zip file that writes files anywhere on the file system via zi…KEVEPSS 65%analysed7.8CVE-2025-60710Windows Task Host link following privilege escalationThe Host Process for Windows Tasks resolves links improperly before accessing files (CWE-59), letting a local attacker redirect file operations to at…KEVEPSS 4.6%analysed8.0CVE-2025-48384Git config CRLF handling allows submodule path link-following code executionGit mishandles trailing carriage returns when writing config values, so a submodule path ending in CR is read back altered during submodule initializ…KEVEPSS 4.1%analysed7.1CVE-2025-21391Microsoft Windows Storage Elevation of Privilege via Link FollowingCVE-2025-21391 is a link-following flaw in the Windows Storage component that lets a local user escalate privileges. It affects a broad set of Window…KEVEPSS 2.3%analysed

Source: NIST National Vulnerability Database (record CVE-2026-40931), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.