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

Quick assessment

Affected
isaacs node-tar
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

isaacs node-tar是isaacs个人开发者开源的一款用于文件压缩/解压缩的软件包。 isaacs node-tar 7.5.21之前版本存在资源管理错误漏洞，该漏洞源于filesFilter中的mapHas辅助函数递归处理归档条目路径时未限制路径段数量，特制的GNU L或PAX x长路径头可能导致未捕获的RangeError堆栈溢出，导致异步和流式Node.js消费者被终止，造成拒绝服务。

CVSS 7.5 · High EPSS 0.53% · P43

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
isaacs node-tar < 7.5.21 affected
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I. Basic Information for CVE-2026-73566

Vulnerability Information
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Vulnerability Title
node-tar: Uncontrolled recursion in mapHas/filesFilter allows uncatchable stack-overflow DoS via crafted long-path tar with member selection
Source: CVE Program / CVE List V5
Vulnerability Description
node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.21, node-tar's filesFilter in src/list.ts uses the recursive mapHas helper to walk an archive entry path upward with path.dirname() and no segment cap when tar.t(...) or tar.x(...) receives a non-empty member-selection list. A crafted GNU L or PAX x long-path header with thousands of slash-separated segments reaches this.filter(entry.path, entry) in Parser[CONSUMEHEADER] in src/parse.ts before Unpack[CHECKPATH] applies maxDepth, causing an uncatchable RangeError stack overflow that terminates asynchronous and streaming Node.js consumers. This issue is fixed in version 7.5.21.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
isaacs node-tar 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
isaacs node-tar是isaacs个人开发者开源的一款用于文件压缩/解压缩的软件包。 isaacs node-tar 7.5.21之前版本存在资源管理错误漏洞，该漏洞源于filesFilter中的mapHas辅助函数递归处理归档条目路径时未限制路径段数量，特制的GNU L或PAX x长路径头可能导致未捕获的RangeError堆栈溢出，导致异步和流式Node.js消费者被终止，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
isaacs node-tar < 7.5.21 -

II. Public POCs for CVE-2026-73566

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6302 chars
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III. Intelligence Information for CVE-2026-73566

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Patches & Fixes for CVE-2026-73566 (1)

Vendor Advisories for CVE-2026-73566 (1)

IV. Related Vulnerabilities

Same product: node-tar
Same vendor: isaacs
Same weakness: CWE-400

V. Comments for CVE-2026-73566

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