Symlink Vulnerability in node-tar for Node.js by Isaacs
CVE-2026-31802

8.2HIGH

Key Information:

Vendor

Isaacs

Status
Node-tar
Vendor
CVE Published:
9 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-31802?

node-tar, a comprehensive Tar utility for Node.js, is susceptible to a symlink vulnerability that allows an attacker to craft a drive-relative symlink target. This exploitation can lead to the creation of symlinks that point to paths outside the targeted extraction directory. As a result, during the normal extraction process using tar.x(), files can be overwritten outside the current working directory. This issue was resolved in version 7.5.11, reinforcing the importance of using updated packages to maintain security integrity.

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Affected Version(s)

node-tar < 7.5.11

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-31802
Created by Jvr2022

References

https://github.com/isaacs/node-tar/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/isaacs/node-tar/commit/f48b5fa3b7985dd...
x_refsource_MISC

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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