EUVD-2026-42308Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable extraction endpoint requires no auth; impact is partial DoS (process crash) only, with no confidentiality or integrity effect.
Primary rating from Vendor (GitHub_M).
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
5DescriptionNVD
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.
AnalysisAI
Denial of service in node-tar prior to 7.5.18 allows unauthenticated network-reachable attackers to crash Node.js processes by submitting crafted tar archives containing all-digit PAX header path or linkpath values. The library incorrectly coerces these string values to JavaScript numbers in src/pax.ts, causing downstream path handling (normalizeWindowsPath(entry.path).split('/')) to throw an uncaught TypeError when it attempts to call a string method on a numeric value. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target application must use node-tar in a version prior to 7.5.18 and must process a tar archive containing a PAX extended header where the path or linkpath field is composed entirely of digits. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) reflects a low-complexity, unauthenticated, network-reachable denial of service with limited availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a tar archive in PAX format where the extended header sets the path field to an all-digit value such as '12345'. When this archive is submitted to a web application or CI pipeline that uses node-tar prior to 7.5.18 to extract uploaded archives, the library coerces the path to the JavaScript number 12345, causing normalizeWindowsPath() to invoke .split('/') on a Number object, throwing an uncaught TypeError that crashes the extraction process and potentially the surrounding Node.js worker. … |
| Remediation | Upgrade node-tar to version 7.5.18 or later; this is the vendor-released patch that addresses the type coercion defect in src/pax.ts. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-704 – Incorrect Type Conversion or Cast
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External POC / Exploit Code
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