CVE-2026-26960

node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384	Patch
https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f	Patch
https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:isaacs:tar:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-02-20 02:16

Updated : 2026-02-20 19:24

NVD link : CVE-2026-26960

Mitre link : CVE-2026-26960

CVE.ORG link : CVE-2026-26960

JSON object : View

Products Affected

isaacs

tar

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

{"id": "CVE-2026-26960", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "published": "2026-02-20T02:16:53.883", "references": [{"url": "https://github.com/isaacs/node-tar/commit/2cb1120bcefe28d7ecc719b41441ade59c52e384", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/isaacs/node-tar/commit/d18e4e1f846f4ddddc153b0f536a19c050e7499f", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/isaacs/node-tar/security/advisories/GHSA-83g3-92jg-28cx", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attacker-controlled archive can create a hardlink inside the extraction directory that points to a file outside the extraction root, enabling arbitrary file read and write as the extracting user. Severity is high because the primitive bypasses path protections and turns archive extraction into a direct filesystem access primitive. This issue has been fixed in version 7.5.8."}, {"lang": "es", "value": "node-tar es un Tar con todas las funciones para Node.js. Al usar las opciones predeterminadas en las versiones 7.5.7 e inferiores, un archivo controlado por el atacante puede crear un enlace duro dentro del directorio de extracci\u00f3n que apunte a un archivo fuera de la ra\u00edz de extracci\u00f3n, permitiendo la lectura y escritura arbitraria de archivos como el usuario extractor. La gravedad es alta porque la primitiva elude las protecciones de ruta y convierte la extracci\u00f3n del archivo en una primitiva de acceso directo al sistema de archivos. Este problema ha sido solucionado en la versi\u00f3n 7.5.8."}], "lastModified": "2026-02-20T19:24:16.537", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:isaacs:tar:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "709C920B-A33B-4301-AC36-EF3065986019", "versionEndExcluding": "7.5.8"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}