CVE-2026-59873: node-tar is a tar archive manipulation library for Node.js

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-59873 is a high-severity flaw (CVSS 7.5) 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 7.5.19, node-tar does not enforce hard upper bounds on total decompressed data, entry counts, or decompression ratio in extraction and parsing paths such as src/extract.ts, allowing a small crafted gzip bomb to exhaust disk space and CPU. This issue is fixed in version 7.5.19.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-770
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 17:10 UTCUpdated Record last modified

isaacs tar UPGRADE

Affected: < 7.5.19

Fixed in: 7.5.19

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls tar

2. UPGRADE to 7.5.19

npm install tar@">=7.5.19"

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-2026-59873?

tar: upgrade to 7.5.19. Exact commands for each OS are on this page.

Is CVE-2026-59873 being exploited?

CVE-2026-59873 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-2026-59873 affect?

CVE-2026-59873 affects tar. Severity is high (CVSS 7.5). node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.19, node-tar does not enforce hard upper bounds on total decompressed data, entry counts, or decompression ratio in extraction and parsing paths such as src/extract.ts

How urgent is CVE-2026-59873?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities

Related CVEs

CVE-2026-59871 MEDIUM 5.3 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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