{"cve":{"cve_id":"CVE-2026-55584","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.02417,"epss_percentile":0.83257,"epss_as_of":"2026-09-15","description":"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.","published_at":"2026-08-28T18:29:36.723000Z","last_modified_at":"2026-09-09T21:09:13.080000Z","cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":["CWE-290"],"nvd_references":["https://github.com/phpsysinfo/phpsysinfo/security/advisories/GHSA-786w-p5pm-cvgh","https://github.com/phpsysinfo/phpsysinfo/commit/019fa2d7e568ea11461adb4bd33da5dc87c4b9ab","https://github.com/phpsysinfo/phpsysinfo/releases/tag/v3.4.6"],"vuln_status":"Deferred","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-08-28T21:04:04.688875Z","updated_at":"2026-09-11T23:39:39.689094Z"},"effective_severity":"HIGH","badges":["exploit"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"phpsysinfo","vendor_name":"phpsysinfo","product_slug":"phpsysinfo","product_name":"phpsysinfo","version_start":"< 3.4.6","version_start_inclusive":true,"version_end":"< 3.4.6","version_end_inclusive":true,"cpe23_uri":"cve5:phpsysinfo:phpsysinfo:< 3.4.6:< 3.4.6"}],"exploit_refs":[{"source":"exploit-db","kind":"exploit-db","url":"https://www.exploit-db.com/exploits/52648","title":"phpSysInfo 3.4.5 - IP Allowlist Bypass","author":"Muhammed Mirac Kayikci","disclosed_at":"2026-08-17"}],"news":[],"references":[{"url":"https://github.com/phpsysinfo/phpsysinfo/security/advisories/GHSA-786w-p5pm-cvgh","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/phpsysinfo/phpsysinfo/commit/019fa2d7e568ea11461adb4bd33da5dc87c4b9ab","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/phpsysinfo/phpsysinfo/releases/tag/v3.4.6","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"exploit_known","at":"2026-08-17T00:00:00Z","label":"Public exploit available","source":"exploit-db"},{"type":"published","at":"2026-08-28T18:29:36.723000Z","label":"CVE published","source":null},{"type":"ssvc_changed","at":"2026-08-31T19:35:30.379822Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-31T19:35:30.379822Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-31T19:35:30.379822Z","label":"SSVC decision revised","source":"vulnrichment"}]}