CVE-2026-103592 — simple-php-router through 5.4.1.7 IP restriction bypass via forwarding headers
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 wh…
Published: 2026-09-30 · CVSS: 6.9 · CVSS 4.0
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 · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7