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Vulnerability record · CVE-2026-23745 · published 16 January 2026

CVE-2026-23745: Isaacs tar path traversal vulnerability

Isaacs · Tar

node-tar is a Tar for Node.js. The node-tar library (<= 7.5.2) fails to sanitize the linkpath of Link (hardlink) and SymbolicLink entries when preservePaths is false (the default secure behavior). This allows malicious archives to bypass the extraction root restriction, leading to Arbitrary File Overwrite via hardlinks and Symlink Poisoning via absolute symlink targets. This vulnerability is fixed in 7.5.3.

8.2 CVSS 4.0 High EPSS 0.38% · top 70.5% CWE-22 · Path traversal
8.2CVSS 4.0 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References, 1 tagged exploit
7 Sep 2026Last modified by NVD

Description

node-tar is a Tar for Node.js. The node-tar library (<= 7.5.2) fails to sanitize the linkpath of Link (hardlink) and SymbolicLink entries when preservePaths is false (the default secure behavior). This allows malicious archives to bypass the extraction root restriction, leading to Arbitrary File Overwrite via hardlinks and Symlink Poisoning via absolute symlink targets. This vulnerability is fixed in 7.5.3.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

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

References

LinkTags
https://github.com/isaacs/node-tar/commit/340eb285b6d986e91969a1170d7fe9b0face405e Patch
https://github.com/isaacs/node-tar/security/advisories/GHSA-8qq5-rm4j-mr97 ExploitPatchVendor Advisory
https://access.redhat.com/errata/RHSA-2026:18480
https://access.redhat.com/errata/RHSA-2026:18868
https://access.redhat.com/errata/RHSA-2026:19712
https://access.redhat.com/errata/RHSA-2026:2144
https://access.redhat.com/errata/RHSA-2026:2900
https://access.redhat.com/errata/RHSA-2026:2926
https://access.redhat.com/errata/RHSA-2026:3782
https://access.redhat.com/errata/RHSA-2026:41928
https://access.redhat.com/errata/RHSA-2026:6192
https://access.redhat.com/security/cve/CVE-2026-23745
https://bugzilla.redhat.com/show_bug.cgi?id=2430538
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23745.json

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2026-23745), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.