{"id":"CVE-2026-103592","summary":"simple-php-router through 5.4.1.7 IP restriction bypass via forwarding headers","details":"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.","modified":"2026-10-02T03:47:26.036430594Z","published":"2026-09-30T23:02:36.416Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-348"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103592.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103592.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103592"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/simple-php-router-through-5.4.1.7-ip-restriction-bypass-via-forwarding-headers"},{"type":"REPORT","url":"https://github.com/skipperbent/simple-php-router/issues/727"},{"type":"PACKAGE","url":"https://github.com/skipperbent/simple-php-router"},{"type":"ARTICLE","url":"https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Middleware/IpRestrictAccess.php"},{"type":"ARTICLE","url":"https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.php"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/skipperbent/simple-php-router","events":[{"introduced":"0"},{"fixed":"a2843d5b1e037f8b61cc99f27eab52a28bf41dfd"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"0"},{"last_affected":"5.4.1.7"},{"fixed":"5.4.1.7"}]}}],"versions":["5.4.1.6","5.4.1.5","5.4.1.4","5.4.1.3","5.4.1.2","5.4.1.1","5.4.1.0","5.4.0.1","5.4.0.0","5.3.0.5","5.3.0.4","5.3.0.3","5.3.0.2","5.3.0.1","5.3.0.0","5.2.0.1","5.2.0.0","5.1.1.0","5.1.0.0","5.0.0.3","5.0.0.2","4.3.7.2","4.3.7.1","4.3.7.0","4.3.6.2","4.3.6.1","4.3.6.0","4.3.5.0","4.3.4.2","4.3.4.1","4.3.4.0","4.3.3.0","4.3.2.3","4.3.2.2","4.3.2.1","4.3.2.0","4.3.1.0","4.3.0.0","4.2.0.6","4.2.0.5","4.2.0.4","4.2.0.3","4.2.0.2","4.2.0.1","4.2.0.0","4.1.0.0","4.0.0.13","4.0.0.12","4.0.0.11","4.0.0.10","4.0.0.9","4.0.0.8","4.0.0.7","4.0.0.6","4.0.0.5","4.0.0.4","4.0.0.3","4.0.0.2","4.0.0.0","2.0","1.3.0.7","1.3.0.6","1.3.0.5","1.3.0.4","1.3.0.3","1.3.0.2","1.3.0.1","1.3.0.0","1.2.8.6","1.2.8.5","1.2.8.4","1.2.8.3","1.2.8.2","1.2.8.1","1.2.8","1.2.7.7","1.2.7.6","1.2.7.5","1.2.7.4","1.2.7.3","1.2.7.2","1.2.7.1","1.2.7","1.2.6.2","1.2.6.1","1.2.6","1.2.5","1.2.4","1.2.3","1.2.2","1.2.1","1.2","1.1.2","1.1.1","1.1","1.0.3.1","1.0.3","1.0.2.1","1.0.2","1.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103592.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}]}