PT-2026-56494 · Isaacs · Node-Tar

Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-59874

NVD

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Exploit

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2026-59874

Affected Products

Node-Tar

References · 4

• 🔥 https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-59874 · Security Note
• https://github.com/isaacs/node-tar/releases/tag/v7.5.18 · Note
• https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5 · Note