CVE-2026-103592: Pecee Simple-Router

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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

• Pecee Simple-Router: up to and including 5.4.1.7

Published 2026-09-30. Last modified 2026-10-06.