CVE-2026-59871: node-tar is a tar archive manipulation library for Node.js

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MEDIUM 5.3REMOTEUPGRADE

CVE-2026-59871 is a medium-severity flaw (CVSS 5.3) affecting tar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-704
Published	2026-07-08
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: isaacs

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-08 16:16 UTCPublished CVE record published
2026-10-25 20:10 UTCUpdated Record last modified

isaacs tar UPGRADE

Affected: < 7.5.18

Fixed in: 7.5.18

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls tar

2. UPGRADE to 7.5.18

npm install tar@">=7.5.18"

Advisories and coverage

Official advisories

Amazon Linux 2023 ALAS: ALAS2023-2026-3277 (important): nodejs22 2026-10-24

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59871?

tar: upgrade to 7.5.18. Exact commands for each OS are on this page.

Is CVE-2026-59871 being exploited?

CVE-2026-59871 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59871 affect?

CVE-2026-59871 affects tar. Severity is medium (CVSS 5.3). 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.pa

How urgent is CVE-2026-59871?

Priority 41/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities

Related CVEs

CVE-2026-59873 HIGH 7.5 UPGRADE node-tar is a tar archive manipulation library for Node.js
CVE-2026-59874 HIGH 7.5 UPGRADE node-tar is a tar archive manipulation library for Node.js

References

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