isaacs node-tar up to 7.5.17 PAX Path src/pax.ts path/linkpath path traversal

Summaryinfo

A vulnerability classified as problematic has been found in isaacs node-tar up to 7.5.17. This vulnerability affects unknown code of the file src/pax.ts of the component PAX Path Handler. The manipulation of the argument path/linkpath leads to path traversal. This vulnerability is uniquely identified as CVE-2026-59871. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in isaacs node-tar up to 7.5.17 and classified as problematic. This issue affects some unknown processing of the file src/pax.ts of the component PAX Path Handler. The manipulation of the argument path/linkpath with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is availability. The summary by CVE is:

node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, node-tar coerces all-digit PAX path and linkpath values in src/pax.ts to JavaScript numbers, causing downstream path handling such as normalizeWindowsPath(entry.path).split('/') to throw an uncaught TypeError. This issue is fixed in version 7.5.18.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-59871 since 07/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 7.5.18 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• isaacs

Name

• node-tar

Version

• 7.5.0
• 7.5.1
• 7.5.2
• 7.5.3
• 7.5.4
• 7.5.5
• 7.5.6
• 7.5.7
• 7.5.8
• 7.5.9
• 7.5.10
• 7.5.11
• 7.5.12
• 7.5.13
• 7.5.14
• 7.5.15
• 7.5.16
• 7.5.17

Website

• Product: https://github.com/isaacs/node-tar/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion