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I. Basic Information for CVE-2026-4923
Vulnerability Information

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Vulnerability Title
path-to-regexp vulnerable to Regular Expression Denial of Service via multiple wildcards
Source: NVD (National Vulnerability Database)
Vulnerability Description
Impact: When using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path. Unsafe examples: /*foo-*bar-:baz /*a-:b-*c-:d /x/*a-:b/*c/y Safe examples: /*foo-:bar /*foo-:bar-*baz Patches: Upgrade to version 8.4.0. Workarounds: If you are using multiple wildcard parameters, you can check the regex output with a tool such as https://makenowjust-labs.github.io/recheck/playground/ to confirm whether a path is vulnerable.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1333
Source: NVD (National Vulnerability Database)
Vulnerability Title
Path-to-RegExp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Path-to-RegExp是pillarjs开源的一个工具。用于将路径字符串转换为正则表达式。 path-to-regexp 8.4.0之前版本存在安全漏洞,该漏洞源于使用多个通配符和参数时生成的正则表达式存在缺陷,可能导致正则表达式拒绝服务。
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
VendorProductAffected VersionsCPESubscribe
path-to-regexppath-to-regexp 8.0.0 ~ 8.4.0 -
II. Public POCs for CVE-2026-4923
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III. Intelligence Information for CVE-2026-4923
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