What is CVE-2026-59873?

CVE-2026-59873 is a high-severity vulnerability in Isaacs Node-Tar, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-08.

How severe is CVE-2026-59873?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Isaacs Node-Tar

CVE-2026-59873

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.

Published 2026-07-08 · last modified 2026-07-10.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (49.3th percentile), scored 2026-10-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.001

Affected products

Isaacs Node-Tar — versions < 7.5.19
Isaacs Tar

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/isaacs/node-tar/security/advisories/GHSA-23hp-3jrh-7fpw (Exploit, Vendor Advisory)
github.com/isaacs/node-tar/commit/2812e9338665659b183aa7226518c307044957d3 (Patch)
github.com/isaacs/node-tar/releases/tag/v7.5.19 (Release Notes)

Frequently asked questions

What is CVE-2026-59873?: CVE-2026-59873 is a high-severity vulnerability in Isaacs Node-Tar, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-08.
How severe is CVE-2026-59873?: High severity. CVSS v3 base score is 7.5 out of 10.