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CVE-2026-103043— anchorme through 3.0.8 Regular Expression Denial of Service

Quick assessment

Affected
alexcorvi anchorme
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

anchorme 在 3.0.8 及更早版本中存在正则表达式拒绝服务漏洞，该漏洞位于 IPv6 主机提取的正则表达式中，原因是发生了灾难性回溯。攻击者可以提供具有重复模式的精心构造的输入字符串，导致指数级正则表达式引擎回溯，从而阻塞 Node.js 事件循环并导致其他请求的服务不可用。

CVSS 7.5 · High EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
alexcorvi anchorme ≤ 3.0.8 affected
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I. Basic Information for CVE-2026-103043

Vulnerability Information
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Vulnerability Title
anchorme through 3.0.8 Regular Expression Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
anchorme through 3.0.8 contains a regular expression denial of service vulnerability in the IPv6 host extraction regex due to catastrophic backtracking. Attackers can supply specially crafted input strings with repeated patterns to cause exponential regex engine backtracking, blocking the Node.js event loop and denying service to other requests.
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
CWE-1333
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
alexcorvi anchorme 0 ~ 3.0.8 -

II. Public POCs for CVE-2026-103043

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-103043

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Vendor Advisories for CVE-2026-103043 (1)

Proof of Concept for CVE-2026-103043 (1)

Other References for CVE-2026-103043 (2)

IV. Related Vulnerabilities

Same product: anchorme
Same weakness: CWE-1333

V. Comments for CVE-2026-103043

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