{"id":"CVE-2026-55584","summary":"phpSysInfo: IP allowlist (PSI_ALLOWED) bypass via spoofed X-Forwarded-For / Client-IP headers","details":"phpSysInfo is a customizable PHP script that displays system information. Prior to 3.4.6, the PSI_ALLOWED access-control check in read_config.php trusts attacker-controlled X-Forwarded-For and Client-IP HTTP headers before REMOTE_ADDR. A remote unauthenticated attacker can supply an allowed address in one of these headers to impersonate a trusted client and access exposed hostname, kernel, CPU, memory, filesystem, and network-interface information. This issue is fixed in version 3.4.6.","aliases":["GHSA-786w-p5pm-cvgh"],"modified":"2026-08-30T03:46:55.657965382Z","published":"2026-08-28T18:29:36.723Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-290"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55584.json"},"references":[{"type":"WEB","url":"https://github.com/phpsysinfo/phpsysinfo/releases/tag/v3.4.6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55584.json"},{"type":"ADVISORY","url":"https://github.com/phpsysinfo/phpsysinfo/security/advisories/GHSA-786w-p5pm-cvgh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55584"},{"type":"FIX","url":"https://github.com/phpsysinfo/phpsysinfo/commit/019fa2d7e568ea11461adb4bd33da5dc87c4b9ab"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/phpsysinfo/phpsysinfo","events":[{"introduced":"0"},{"fixed":"019fa2d7e568ea11461adb4bd33da5dc87c4b9ab"},{"fixed":"5cca50ecc7bcbdcd769af42961dff2a800dc7ea6"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"3.4.6"}]}}],"versions":["v3.4.5","v3.4.4","v3.4.3","v3.4.2","v3.4.1","v3.4.0","v3.3.4","v3.3.3","v3.3.2","v3.3.1","v3.3.0","v3.2.10","v3.2.9","v3.2.8","v3.2.7","v3.2.6","v3.2.5","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.2.0","v3.1.17","v3.1.16","v3.1.15","v3.1.14","v3.1.13","v3.1.12","v3.1.11","v3.1.10","v3.1.9","v3.1.8","v3.1.7","v3.1.6","v3.1.5","v3.1.4","v3.1.3","v3.1.2","v3.1.1","v3.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55584.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}