Is there a public exploit for CVE-2026-59874?

No public exploit for CVE-2026-59874 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-59874?

CVE-2026-59874 scores CVSS 8.7 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.43%.

What does CVE-2026-59874 affect?

CVE-2026-59874 affects isaacs node-tar.

8.7 High

node-tar is a tar archive manipulation library for Node.js.

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.

Assessment

CVSS: 8.7 (v4.0)
Severity: High
EPSS: 0.43% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 8 July 2026
Last updated: 25 October 2026
Affected: isaacs · node-tar
Weakness: CWE-835
Assigner: security-advisories@github.com

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

At the source

References

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