Medium severity6.5NVD Advisory· Published Sep 30, 2026
CVE-2026-103592
CVE-2026-103592
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.
Affected products
1- Range: <=5.4.1.7
Patches
Vulnerability mechanics
References
4- github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Middleware/IpRestrictAccess.phpnvd
- github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.phpnvd
- github.com/skipperbent/simple-php-router/issues/727nvd
- www.vulncheck.com/advisories/simple-php-router-through-5.4.1.7-ip-restriction-bypass-via-forwarding-headersnvd
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