CVE-2026-59871: CWE-704: Incorrect Type Conversion or Cast in isaacs node-tar
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.
AI Analysis
Technical Summary
The node-tar library for Node.js versions before 7.5.18 improperly coerces all-digit PAX path and linkpath values into JavaScript numbers in src/pax.ts. This incorrect type conversion causes functions like normalizeWindowsPath(entry.path).split('/') to throw an uncaught TypeError, disrupting normal archive processing. The vulnerability is classified under CWE-704 (Incorrect Type Conversion or Cast). The issue has been resolved in node-tar version 7.5.18.
Potential Impact
This vulnerability does not impact confidentiality or integrity but can cause availability issues by triggering uncaught TypeErrors during path normalization, potentially leading to application crashes or denial of service when processing certain tar archives with all-digit PAX path or linkpath values.
Mitigation Recommendations
Upgrade node-tar to version 7.5.18 or later, where this issue is fixed. No other mitigation is indicated or necessary.
CVE-2026-59871: CWE-704: Incorrect Type Conversion or Cast in isaacs node-tar
Description
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.
CVSS v3.1
Score 5.3medium
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The node-tar library for Node.js versions before 7.5.18 improperly coerces all-digit PAX path and linkpath values into JavaScript numbers in src/pax.ts. This incorrect type conversion causes functions like normalizeWindowsPath(entry.path).split('/') to throw an uncaught TypeError, disrupting normal archive processing. The vulnerability is classified under CWE-704 (Incorrect Type Conversion or Cast). The issue has been resolved in node-tar version 7.5.18.
Potential Impact
This vulnerability does not impact confidentiality or integrity but can cause availability issues by triggering uncaught TypeErrors during path normalization, potentially leading to application crashes or denial of service when processing certain tar archives with all-digit PAX path or linkpath values.
Mitigation Recommendations
Upgrade node-tar to version 7.5.18 or later, where this issue is fixed. No other mitigation is indicated or necessary.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-07T15:41:53.607Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4e73c2c9d9e3dbe36042c0
Added to database: 07/08/2026, 15:58:58 UTC
Last enriched: 07/08/2026, 16:14:20 UTC
Last updated: 07/08/2026, 18:05:30 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.