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High severityNVD Advisory· Published Feb 20, 2026· Updated Feb 20, 2026

node-tar has Arbitrary File Read/Write via Hardlink Target Escape Through Symlink Chain in Extraction

CVE-2026-26960

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
tarnpm
< 7.5.87.5.8

Affected products

49

Patches

Vulnerability mechanics

References

5

News mentions

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