Medium 6.1Published Oct 30, 2025

CVE-2025-64118node-tar vulnerable to race condition leading to uninitialized memory exposure

Updated under an hour ago (Oct 29, 2026, 12:23 AM ET)

Does this affect you?

It affects isaacs node-tar. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for isaacs node-tar

Exploited in the last 30 days

node-tar is a Tar for Node.js. In 7.5.1, using .t (aka .list) with { sync: true } to read tar entry contents returns uninitialized memory contents if tar file was changed on disk to a smaller size while being read. This vulnerability is fixed in 7.5.2.

CVSS: 6.1 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H
Weakness (CWE): CWE-362, CWE-367
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 30, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

isaacs node-tar isaacs:node_tar (from the name)	= 7.5.1	CNA record

References

References

https://github.com/isaacs/node-tar/security/advisories/GHSA-29xp-372q-xqph	x-refsource-confirm
https://github.com/isaacs/node-tar/issues/445	x-refsource-misc
https://github.com/isaacs/node-tar/pull/446	x-refsource-misc
https://github.com/isaacs/node-tar/commit/5330eb04bc43014f216e5c271b40d5c00d45224d	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.