CVE-2026-59874

HighCVSS 7.5/10Last modified Oct 25, 2026

Description

node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, tar.replace accepts a checksum-valid tar header with a negative base-256 encoded entry size, causing the archive scanner to make no progress while repeatedly parsing the same header. This issue is fixed in version 7.5.18.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-835

Affected software

Vendor	Product	Versions
isaacs	node-tar	< 7.5.18

References

https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5Patch
https://github.com/isaacs/node-tar/releases/tag/v7.5.18Release Notes
https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5wExploit, Vendor Advisory
https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5wExploit, Vendor Advisory

Timeline

Published: Jul 8, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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