CVE-2026-73566Public exploitNetwork attack vectorHinoki check available

Process crash via unbounded path recursion

Published Aug 13, 2026 · Updated Aug 13, 2026

Uncontrolled recursion in node-tar before 7.5.21 allows remote attackers to crash Node.js consumers via a crafted tar archive. The filesFilter callback invokes mapHas, which recursively applies path.dirname() to every untrusted path segment without a depth limit. Reachability requires tar.t() or tar.x() with member selection on an untrusted archive; asynchronous and streaming use terminates the Node.js process.

CVSS severity7.5
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uncontrolled recursion in node-tar before 7.5.21 allows remote attackers to crash Node.js consumers via a crafted tar archive. The filesFilter callback invokes mapHas, which recursively applies path.dirname() to every untrusted path segment without a depth limit. Reachability requires tar.t() or tar.x() with member selection on an untrusted archive; asynchronous and streaming use terminates the Node.js process.

The record

CVE
CVE-2026-73566
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
isaacs
Product
tar
Classifications
CWE-400, CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.5.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

isaacs · tarversion=< 7.5.21

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-674Uncontrolled Recursion
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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