Vulnerability · Published Jul 8, 2026 · Assigned by GitHub_M

CVE-2026-59871node-tar: Process crash via PAX numeric path type confusion

Medium 5.3

In plain English

A medium-severity security flaw in node-tar from isaacs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.6%top 48.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, node-tar coerces all-digit PAX path and linkpath values in src/pax.ts to JavaScript numbers, causing downstream path handling such as normalizeWindowsPath(entry.path).split('/') to throw an uncaught TypeError. This issue is fixed in version 7.5.18.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	node-tar	no fix listed	DEBIAN-CVE-2026-59871
Debian:13	node-tar	no fix listed	DEBIAN-CVE-2026-59871
Debian:14	node-tar	7.5.19+~4.0.1-1	DEBIAN-CVE-2026-59871
Ubuntu:22.04:LTS	node-tar	no fix listed	UBUNTU-CVE-2026-59871
Ubuntu:24.04:LTS	node-tar	no fix listed	UBUNTU-CVE-2026-59871
Ubuntu:25.10	node-tar	no fix listed	UBUNTU-CVE-2026-59871
Ubuntu:26.04:LTS	node-tar	no fix listed	UBUNTU-CVE-2026-59871
Ubuntu:26.10	node-tar	no fix listed	UBUNTU-CVE-2026-59871
npm	tar	7.5.18	GHSA-w8wr-v893-vjvp

Affected products (as reported)

Vendor	Product	Versions
isaacs	node-tar	< 7.5.18

Weakness: CWE-704 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

https://github.com/isaacs/node-tar/security/advisories/GHSA-w8wr-v893-vjvp x_refsource_CONFIRM
https://github.com/isaacs/node-tar/commit/e02a4e9e013c4be95302e2eb2047a942b883c27b x_refsource_MISC
https://github.com/isaacs/node-tar/releases/tag/v7.5.18 x_refsource_MISC