{"cve":{"cve_id":"CVE-2023-43809","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":0.0089,"epss_percentile":0.54665,"epss_as_of":"2026-06-23","description":"Soft Serve is a self-hostable Git server for the command line. Prior to version 0.6.2, a security vulnerability in Soft Serve could allow an unauthenticated, remote attacker to bypass public key authentication when keyboard-interactive SSH authentication is active, through the `allow-keyless` setting, and the public key requires additional client-side verification for example using FIDO2 or GPG. This is due to insufficient validation procedures of the public key step during SSH request handshake, granting unauthorized access if the keyboard-interaction mode is utilized. An attacker could exploit this vulnerability by presenting manipulated SSH requests using keyboard-interactive authentication mode. This could potentially result in unauthorized access to the Soft Serve. Users should upgrade to the latest Soft Serve version `v0.6.2` to receive the patch for this issue. To workaround this vulnerability without upgrading, users can temporarily disable Keyboard-Interactive SSH Authentication using the `allow-keyless` setting.","published_at":"2023-10-04T20:40:41.822000Z","last_modified_at":null,"cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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":"poc","ssvc_automatable":true,"ssvc_technical_impact":"partial","cwes":["CWE-287"],"nvd_references":["https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-mc97-99j4-vm2v","https://github.com/charmbracelet/soft-serve/issues/389","https://github.com/charmbracelet/soft-serve/commit/407c4ec72d1006cee1ff8c1775e5bcc091c2bc89","https://github.com/charmbracelet/soft-serve/releases/tag/v0.6.2"],"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":"2026-06-29T01:38:07.943344Z"},"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":"U","value_label":"Unchanged"},{"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":"charmbracelet","vendor_name":"charmbracelet","product_slug":"soft-serve","product_name":"soft-serve","version_start":"< 0.6.2","version_start_inclusive":true,"version_end":"< 0.6.2","version_end_inclusive":true,"cpe23_uri":"cve5:charmbracelet:soft-serve:< 0.6.2:< 0.6.2"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-mc97-99j4-vm2v","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/charmbracelet/soft-serve/issues/389","source_type":"MISC","tags":[]},{"url":"https://github.com/charmbracelet/soft-serve/commit/407c4ec72d1006cee1ff8c1775e5bcc091c2bc89","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/charmbracelet/soft-serve/releases/tag/v0.6.2","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2023-10-04T20:40:41.822000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:30:01.336111Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:30:01.336111Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:30:01.336111Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:38:07.943344Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:38:07.943344Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:38:07.943344Z","label":"SSVC decision revised","source":"vulnrichment"}]}