CVE-2026-29786
node-tar: Hardlink Path Traversal via Drive-Relative Linkpath
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.
INFO
Published Date :
March 7, 2026, 4:15 p.m.
Last Modified :
March 11, 2026, 9:50 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update node-tar to version 7.5.10 or later.
- Verify archive integrity after extraction.
Public PoC/Exploit Available at Github
CVE-2026-29786 has a 5 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-29786.
| URL | Resource |
|---|---|
| https://github.com/isaacs/node-tar/commit/7bc755dd85e623c0279e08eb3784909e6d7e4b9f | Patch |
| https://github.com/isaacs/node-tar/security/advisories/GHSA-qffp-2rhf-9h96 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-29786 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-29786
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DevSecOps Process Tracker
Dockerfile TypeScript CSS JavaScript HTML
Technical analysis and Proof-of-Concept (PoC) for a critical Path Traversal vulnerability via Symlink manipulation in the Node.js 'tar' package (CVE-2026-29786)
JavaScript
PoC for CVE-2026-29786 demonstrating a node-tar hardlink path traversal that allows overwriting files outside the extraction directory.
JavaScript
None
Dockerfile
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-29786 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-29786 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 11, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N Added CWE CWE-22 Added CPE Configuration OR *cpe:2.3:a:isaacs:tar:*:*:*:*:*:node.js:*:* versions up to (excluding) 7.5.10 Added Reference Type GitHub, Inc.: https://github.com/isaacs/node-tar/commit/7bc755dd85e623c0279e08eb3784909e6d7e4b9f Types: Patch Added Reference Type GitHub, Inc.: https://github.com/isaacs/node-tar/security/advisories/GHSA-qffp-2rhf-9h96 Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Mar. 07, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-22 Added CWE CWE-59 Added Reference https://github.com/isaacs/node-tar/commit/7bc755dd85e623c0279e08eb3784909e6d7e4b9f Added Reference https://github.com/isaacs/node-tar/security/advisories/GHSA-qffp-2rhf-9h96