{"cve":{"cve_id":"CVE-2020-15093","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":0.01357,"epss_percentile":0.68075,"epss_as_of":"2026-06-23","description":"The tough library (Rust/crates.io) prior to version 0.7.1 does not properly verify the threshold of cryptographic signatures. It allows an attacker to duplicate a valid signature in order to circumvent TUF requiring a minimum threshold of unique signatures before the metadata is considered valid. A fix is available in version 0.7.1. CVE-2020-6174 is assigned to the same vulnerability in the TUF reference implementation.","published_at":"2020-07-09T18:45:16Z","last_modified_at":null,"cvss_v3_score":8.6,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N","cvss_v3_severity":"HIGH","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-347"],"nvd_references":["https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49","https://crates.io/crates/tough","https://github.com/theupdateframework/tuf/pull/974","https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e"],"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":"2026-06-28T23:13:33.753507Z"},"effective_severity":"HIGH","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":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"awslabs","vendor_name":"awslabs","product_slug":"tough","product_name":"tough","version_start":"< 0.7.1","version_start_inclusive":true,"version_end":"< 0.7.1","version_end_inclusive":true,"cpe23_uri":"cve5:awslabs:tough:< 0.7.1:< 0.7.1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://crates.io/crates/tough","source_type":"MISC","tags":[]},{"url":"https://github.com/theupdateframework/tuf/pull/974","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2020-07-09T18:45:16Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:02:19.627143Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:02:19.627143Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:02:19.627143Z","label":"CVSS score revised","source":"cvelistv5"}]}