{"id":"CVE-2026-103592","title":"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","summary":"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-For…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-348"],"vendor":"pecee","product":"simple-router","affected":["simple-router <= 5.4.1.7"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T23:16:58.963","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103592","references":[{"url":"https://github.com/skipperbent/simple-php-router","label":"disclosure@vulncheck.com"},{"url":"https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Middleware/IpRestrictAccess.php","label":"disclosure@vulncheck.com"},{"url":"https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.php","label":"disclosure@vulncheck.com"},{"url":"https://github.com/skipperbent/simple-php-router/issues/727","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/simple-php-router-through-5.4.1.7-ip-restriction-bypass-via-forwarding-headers","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-30T23:29:32.580Z","slug":"CVE-2026-103592","body":"## Overview\n\nsimple-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}