{"id":"CVE-2026-103592","published":"2026-09-30T23:16:58.963","lastModified":"2026-10-06T00:16:32.783","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.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cwes":["CWE-348"],"vendors":[],"products":[],"references":[{"url":"https://github.com/skipperbent/simple-php-router","tags":[]},{"url":"https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Middleware/IpRestrictAccess.php","tags":[]},{"url":"https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.php","tags":[]},{"url":"https://github.com/skipperbent/simple-php-router/issues/727","tags":[]},{"url":"https://www.vulncheck.com/advisories/simple-php-router-through-5.4.1.7-ip-restriction-bypass-via-forwarding-headers","tags":[]}],"exploitRefs":[{"url":"https://github.com/skipperbent/simple-php-router","tags":[]},{"url":"https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Middleware/IpRestrictAccess.php","tags":[]},{"url":"https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.php","tags":[]},{"url":"https://github.com/skipperbent/simple-php-router/issues/727","tags":[]}],"hasPoc":true,"ai":null}