CVE-2026-26960
Arbitrary File Read/Write via Hardlink Target Escape Through Symlink Chain in node-tar Extraction
7.1
HIGH
CVSS 3.1
EPSS 0.01%
Description
node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.
How to fix CVE-2026-26960
To remediate CVE-2026-26960, upgrade the affected package to a fixed version below.
- —upgrade to 6.0.5+ds1+~cs11.3.9-1+deb11u3 or later
- —upgrade to 7.5.8 or later
Is CVE-2026-26960 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 6.0.5+ds1+~cs11.3.9-1+deb11u3
- from 0, < 7.5.8
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |