CVE-2026-59874

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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

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

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-835

Published

2026-07-08

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• isaacs:tar

Packages (OSV)

References

• https://github.com/isaacs/node-tar/commit/9e78bf058b2c22dd4d52e00d8922d5c06fc2f7b5
• https://github.com/isaacs/node-tar/releases/tag/v7.5.18
• https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w
• https://github.com/isaacs/node-tar/security/advisories/GHSA-8x88-c5mf-7j5w

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