node-tar: Hardlink Path Traversal via Drive-Relative Linkpath
Priority HIGH 69CWE-22Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00511 43rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed node-tar (isaacs): 7.5.10tar (npm): 7.5.10
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| isaacs | node-tar | before 7.5.10 | 7.5.10 | Patch available | CNA |
| — | tar (npm) | before 7.5.10 | 7.5.10 | Patch available | GHSA-qffp-2rhf-9h96 |
- node-tar Vendorisaacs Affected before 7.5.10 Fixed in 7.5.10 Patch available CNA
- tar (npm) Vendor— Affected before 7.5.10 Fixed in 7.5.10 Patch available GHSA-qffp-2rhf-9h96
Remediation
- Fix · CNA node-tar (isaacs) Fixed in 7.5.10
- Fix · GHSA-qffp-2rhf-9h96 tar (npm) Fixed in 7.5.10 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 21 products
- Cryostat 4
- Logging Subsystem for Red Hat OpenShift
- Network Observability Operator
- Red Hat 3scale API Management Platform 2
- Red Hat AMQ Broker 7
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Fuse 7
- Red Hat JBoss Enterprise Application Platform 7
- Red Hat JBoss Enterprise Application Platform 8
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Dev Spaces
- Red Hat Openshift Data Foundation 4
- Red Hat Process Automation 7
- Red Hat Single Sign-On 7
- Red Hat Trusted Artifact Signer
- Red Hat build of Apache Camel - HawtIO 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-29786
- 2026-10-03 Alias added: GHSA-qffp-2rhf-9h96
References
More isaacs Tar vulnerabilities
- TI-2026-42687 node-tar: Decompression/parse DoS via unlimited input CVSS 4.0CRITICAL 9.2
- TI-2026-42688 node-tar: Negative tar entry size causes infinite loop in archive replace CVSS 4.0HIGH 8.7
- TI-2026-42686 node-tar: Process crash via PAX numeric path type confusion CVSS 3.1HIGH 7.5
- TI-2026-24357 node-tar Symlink Path Traversal via Drive-Relative Linkpath CVSS 4.0HIGH 8.2
- TI-2026-20041 node-tar Vulnerable to Arbitrary File Creation/Overwrite via Hardlink Path Traversal CVSS 3.1HIGH 8.2
- TI-2026-19118 node-tar Vulnerable to Arbitrary File Overwrite and Symlink Poisoning via Insufficient Path Sanitization CVSS 4.0HIGH 8.2
Sources
- CVE-2026-29786 · CVE Program
- CVE-2026-29786 · NVD
- FIRST EPSS
- GHSA-qffp-2rhf-9h96 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-29786 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences