CVE-2026-73566: node-tar: Uncontrolled recursion in mapHas/filesFilter allows uncatchable stack-overflow DoS via crafted long-path tar with member selection

CSIRTS triage

What: node-tar contains uncontrolled recursion in mapHas/filesFilter functions that allows stack-overflow denial of service via crafted tar files with long paths and member selection.
Who is affected: Applications using node-tar to extract or process tar archives from untrusted sources.
Urgency: High severity (CVSS 7.5) and not exploited; update promptly to prevent DoS attacks on archive processing pipelines.
Action: Upgrade node-tar to a patched version that implements recursion depth limits or iterative algorithms in file filtering.

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EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-735660.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all EPSS-scored CVEs.

CVE	CSIRTS overview	External
CVE-2026-73566	coverage & exploitation status	NVD · CVE.org

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