How serious is CVE-2026-29786?

This vulnerability has a CVSS score of 8.2 out of 10, classified as HIGH severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-29786?

Yes, proof-of-concept exploit code for CVE-2026-29786 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-29786?

CVE-2026-29786 affects isaacs tar. Check the full CVE details for specific version information.

How do I fix CVE-2026-29786?

To remediate CVE-2026-29786, check for security patches from isaacs. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-29786

High

|8.2

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to trick the tar tool into creating a hardlink that points to a file outside the intended extraction folder, potentially overwriting important files on the system. It can be exploited when using versions prior to 7.5.10 and requires the attacker to provide a specially crafted tar file.

Technical 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.

CVSS Vector Analysis

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

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/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

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$3,526($1K-$5K)

Vendor Response

Grade APatched in 4 days

Quick Information

Published

Mar 7, 2026

about 1 month ago

Last Modified

Mar 11, 2026

27 days ago

Vendor

isaacs

Product

tar