Is this vulnerability remotely exploitable?

It can be, if a service exposes an interface (such as file upload, package ingestion, or backup restore) where an attacker can provide a TAR archive that is automatically extracted using node-tar. In such cases, exploitation does not require local access.

What level of access does an attacker need to exploit this?

The attacker must be able to control or significantly influence the TAR archive that is being processed. No shell access is required; control over the archive contents is sufficient when the vulnerable extraction path is invoked.

What is the safest general fix pattern for developers?

The safest pattern is to ensure that all resolved paths (after full normalization and link handling) are validated against a strict extraction root before any filesystem operation, and to either block or heavily constrain hardlink and symlink handling. Additionally, use updated archive libraries that enforce consistent validation and extraction semantics.

Severity:

HIGH RISK

(8.2)

Hardlink Path Traversal (CWE-22) in node-tar Archive Extraction

CVE-2026-24842

Published:

Jan 27, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Path Traversal in Archive Extraction

CWE:

CWE-22;CWE-59

Impact:

Arbitrary File System Access via Hardlink Creation

Severity:

HIGH RISK

(8.2)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal in Archive Extraction

CWE:

CWE-22;CWE-59

Impact:

Arbitrary File System Access via Hardlink Creation

Severity:

HIGH RISK

(8.2)

CVSS Version:

3.1

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Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Hardlink Path Traversal (CWE-22) in node-tar Archive Extraction

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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