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CVE-2026-59873

Isaacs Tar denial of service

7.5 HIGHPublic exploitEPSS 0.64%
  1. Published8 Jul 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Isaacs Tar< 7.5.19

Remediation

Fixed in
Isaacs Tar≥ 7.5.19

References

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Frequently asked

Is CVE-2026-59873 being actively exploited?

CVE-2026-59873 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.64%.

How severe is CVE-2026-59873?

CVE-2026-59873 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.64% probability of exploitation.

Which products are affected by CVE-2026-59873?

Affected products include Isaacs Tar.

How do I fix CVE-2026-59873?

Upgrade affected software to a fixed version, for example Isaacs Tar 7.5.19 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.