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.

EPSS: 0.004 (35.7th percentile) — read the EPSS interpretation.

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.

Affected products

Isaacs Node-tar — versions < 7.5.19
Isaacs Tar

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, 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.