{"cve":{"cve_id":"CVE-2026-45775","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":0.00323,"epss_percentile":0.23897,"epss_as_of":"2026-06-23","description":"Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a path traversal vulnerability in Discourse backup handling could allow an authenticated administrator on one site in a multisite deployment to access backup files belonging to another site when backups are stored locally. In affected configurations, an admin on Site A could potentially retrieve sensitive backup data from Site B (same host, multisite) by crafting a backup download request with a traversal payload. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.","published_at":"2026-06-12T20:25:33.729000Z","last_modified_at":null,"cvss_v3_score":6.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-22"],"nvd_references":["https://github.com/discourse/discourse/security/advisories/GHSA-5j6v-4x6g-9pg5"],"vuln_status":null,"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":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:30:33.717402Z"},"effective_severity":"MEDIUM","badges":[],"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":"H","value_label":"High"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"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":"discourse","vendor_name":"discourse","product_slug":"discourse","product_name":"discourse","version_start":">= 2026.1.0-latest, < 2026.1.4","version_start_inclusive":true,"version_end":">= 2026.1.0-latest, < 2026.1.4","version_end_inclusive":true,"cpe23_uri":"cve5:discourse:discourse:>= 2026.1.0-latest, < 2026.1.4:>= 2026.1.0-latest, < 2026.1.4"},{"vendor_slug":"discourse","vendor_name":"discourse","product_slug":"discourse","product_name":"discourse","version_start":">= 2026.3.0-latest, < 2026.3.1","version_start_inclusive":true,"version_end":">= 2026.3.0-latest, < 2026.3.1","version_end_inclusive":true,"cpe23_uri":"cve5:discourse:discourse:>= 2026.3.0-latest, < 2026.3.1:>= 2026.3.0-latest, < 2026.3.1"},{"vendor_slug":"discourse","vendor_name":"discourse","product_slug":"discourse","product_name":"discourse","version_start":">= 2026.4.0-latest, < 2026.4.1","version_start_inclusive":true,"version_end":">= 2026.4.0-latest, < 2026.4.1","version_end_inclusive":true,"cpe23_uri":"cve5:discourse:discourse:>= 2026.4.0-latest, < 2026.4.1:>= 2026.4.0-latest, < 2026.4.1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-5j6v-4x6g-9pg5","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-06-12T20:25:33.729000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:54:40.246008Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:54:40.246008Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:54:40.246008Z","label":"CVSS score revised","source":"cvelistv5"}]}