CVE-2026-103592— simple-php-router through 5.4.1.7 IP restriction bypass via forwarding headers
Quick assessment
Affected
pecee simple-router
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.
simple-php-router 5.4.1.7 及之前版本存在一个 IP 限制绕过漏洞，位于 IpRestrictAccess 中间件中。该漏洞允许远程未认证的攻击者通过伪造 X-Forwarded-For、CF-Connecting-IP 或 Client-IP 请求头，冒充白名单中的 IP 地址或绕过黑名单限制，从而访问受 IP 限制的路线。
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I. Basic Information for CVE-2026-103592
Vulnerability Information
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Vulnerability Title
simple-php-router through 5.4.1.7 IP restriction bypass via forwarding headers
Source: CVE Program / CVE List V5
Vulnerability Description
simple-php-router through 5.4.1.7 contains an IP restriction bypass vulnerability in the IpRestrictAccess middleware that allows remote unauthenticated attackers to bypass IP whitelist and blacklist protections. Attackers can spoof X-Forwarded-For, CF-Connecting-IP, or Client-IP headers to impersonate whitelisted addresses or evade blacklists, gaining access to IP-restricted routes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不可信的源
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| pecee | simple-router | 0 ~ 5.4.1.7 | - |
|
II. Public POCs for CVE-2026-103592
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-103592 (5)
-
https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.php technical-description
-
https://github.com/skipperbent/simple-php-router/issues/727 issue-tracking
IV. Related Vulnerabilities
Same weakness: CWE-348
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V. Comments for CVE-2026-103592
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