Path Traversal Vulnerability in Nanotar by UnJS
CVE-2025-69874

9.8CRITICAL

Key Information:

Vendor

UnJS

Status
Nanotar
Vendor
CVE Published:
11 February 2026

What is CVE-2025-69874?

The Nanotar library, versions up to 0.2.0, contains a path traversal vulnerability within the parseTar() and parseTarGzip() functions. This flaw enables remote attackers to exploit crafted tar archives to write arbitrary files outside the designated extraction directory. As a result, unauthorized access to sensitive files could occur, posing a significant risk to system integrity and data security. Users are urged to review their implementations and update to secure versions to mitigate potential threats.

References

https://github.com/unjs/nanotar
https://www.npmjs.com/package/nanotar
https://github.com/EthanKim88/ethan-cve-disclosures/blob/...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.