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CVE-2026-29786— node-tar: Hardlink Path Traversal via Drive-Relative Linkpath

Quick assessment

Affected
isaacs node-tar
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

node-tar是isaacs个人开发者的一款用于文件压缩/解压缩的软件包。 node-tar 7.5.10之前版本存在后置链接漏洞，该漏洞源于可被诱骗创建指向提取目录外的硬链接，可能导致文件覆盖。

CVSS 8.2 · High EPSS 0.40% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
isaacs node-tar < 7.5.10 affected
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I. Basic Information for CVE-2026-29786

Vulnerability Information
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Vulnerability Title
node-tar: Hardlink Path Traversal via Drive-Relative Linkpath
Source: CVE Program / CVE List V5
Vulnerability Description
node-tar is a full-featured Tar for Node.js. Prior to version 7.5.10, tar can be tricked into creating a hardlink that points outside the extraction directory by using a drive-relative link target such as C:../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This issue has been patched in version 7.5.10.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
node-tar 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
node-tar是isaacs个人开发者的一款用于文件压缩/解压缩的软件包。 node-tar 7.5.10之前版本存在后置链接漏洞，该漏洞源于可被诱骗创建指向提取目录外的硬链接，可能导致文件覆盖。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
isaacs node-tar < 7.5.10 -

II. Public POCs for CVE-2026-29786

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10639 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-29786

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Patches & Fixes for CVE-2026-29786 (1)

Vendor Advisories for CVE-2026-29786 (1)

IV. Related Vulnerabilities

Same product: node-tar
Same vendor: isaacs
Same weakness: CWE-22

V. Comments for CVE-2026-29786

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