node-tar Symlink Path Traversal via Drive-Relative Linkpath
Priority HIGH 69CWE-22Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 1 fixed, 14 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as C:../../../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This vulnerability is fixed in 7.5.11.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial node-tar (isaacs): 7.5.11tar (npm): 7.5.11Red Hat: 1 advisoryRed Hat: 1 fixed, 14 without a fix
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 7.5.11 | 7.5.11 | Patch available | CNA |
| — | tar (npm) | before 7.5.11 | 7.5.11 | Patch available | GHSA-9ppj-qmqm-q256 |
- node-tar Vendorisaacs Affected before 7.5.11 Fixed in 7.5.11 Patch available CNA
- tar (npm) Vendor— Affected before 7.5.11 Fixed in 7.5.11 Patch available GHSA-9ppj-qmqm-q256
Remediation
- Fix · CNA node-tar (isaacs) Fixed in 7.5.11
- Fix · GHSA-9ppj-qmqm-q256 tar (npm) Fixed in 7.5.11 Advisory →
Red Hat 1 advisory
- RHSA-2026:21772 Released 2026-05-28 · Red Hat rating ImportantRed Hat OpenShift Dev Spaces 3.28.0 Release.
- Red Hat OpenShift Dev Spaces 3.28 registry.redhat.io/devspaces/code-rhel9, registry.redhat.io/devspaces/dashboard-rhel9, registry.redhat.io/devspaces/openvsx-rhel9 +3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Logging Subsystem for Red Hat OpenShift | Affected | No fix planned: Out of support scope |
| Red Hat 3scale API Management Platform 2 | Affected | No fix planned: Out of support scope |
| Red Hat AMQ Broker 7 | Affected | No fix planned: Will not fix |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix planned: Will not fix |
| Red Hat Developer Hub 1 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Fuse 7 | Affected | No fix planned: Out of support scope |
| Red Hat JBoss Enterprise Application Platform 7 | Affected | No fix planned: Out of support scope |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet |
| Red Hat Openshift Data Foundation 4 | Affected | No fix planned: Out of support scope |
| Red Hat Process Automation 7 | Affected | No fix planned: Out of support scope |
| Red Hat Single Sign-On 7 | Affected | No fix planned: Out of support scope |
| Red Hat OpenShift Dev Spaces 3.28 | Fixed | RHSA-2026:21772 |
Not affected: 13 products
- Cryostat 4
- Network Observability Operator
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat JBoss Enterprise Application Platform 8
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Dev Spaces
- Red Hat OpenShift Dev Spaces 3.28
- Red Hat Trusted Artifact Signer
- Red Hat build of Apache Camel - HawtIO 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-31802
- 2026-10-03 Alias added: GHSA-9ppj-qmqm-q256
- 2026-10-27 Affected versions changed · Red Hat
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-2026-23372 node-tar: Hardlink 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-2026-31802 · CVE Program
- CVE-2026-31802 · NVD
- FIRST EPSS
- GHSA-9ppj-qmqm-q256 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-31802 · 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