CVE-2026-59874CWE-835

node-tar: Negative tar entry size causes infinite loop in archive replace

High · published July 8, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
36.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00434 · 36.6th percentile
Weakness
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2026-07-08T15:23Z
EPSS history
Timeline
  • 08 JUL 15:23Z
    node-tar: Negative tar entry size causes infinite loop in archive replace
    cvelistv5