{"cve":{"cve_id":"CVE-2026-46562","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":0.00976,"epss_percentile":0.59515,"epss_as_of":"2026-08-26","description":"Yamcs is a mission control framework. Prior to 5.12.7, the Nashorn ScriptEngine used to evaluate user-supplied JavaScript algorithm text in yamcs-core/src/main/java/org/yamcs/algorithms/ScriptAlgorithmExecutorFactory.java was constructed without a ClassFilter, so a user with the ChangeMissionDatabase privilege could override an algorithm through the MdbOverrideApi.updateAlgorithm endpoint and supply JavaScript that reaches arbitrary Java classes (for example Java.type(\"java.lang.Runtime\").getRuntime().exec(...)) to execute arbitrary OS commands as the Yamcs process; in the default configuration with no security.yaml the built-in guest user has superuser=true, making the issue reachable without authentication. This issue is fixed in versions 5.12.7 and 5.13.0, which disable algorithm editing by default.","published_at":"2026-07-16T16:06:39.148000Z","last_modified_at":"2026-07-20T01:53:17.737000Z","cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"poc","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-94","CWE-95","CWE-470"],"nvd_references":["https://github.com/yamcs/yamcs/security/advisories/GHSA-vmwp-vh32-rj75","https://github.com/yamcs/yamcs/commit/3c550348f866af4675d2ba4a51d8d12b7c7c6011","https://github.com/yamcs/yamcs/commit/4ff8fda642ea8c3309a4d3f379aa77b763148992","https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7","https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0"],"vuln_status":"Analyzed","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":"2026-07-16T17:35:28.560681Z","updated_at":"2026-07-20T07:06:21.649420Z"},"effective_severity":"CRITICAL","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":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"spaceapplications","vendor_name":"spaceapplications","product_slug":"yamcs","product_name":"yamcs","version_start":null,"version_start_inclusive":null,"version_end":"5.12.7","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:*"},{"vendor_slug":"yamcs","vendor_name":"yamcs","product_slug":"yamcs","product_name":"yamcs","version_start":"< 5.12.7","version_start_inclusive":true,"version_end":"< 5.12.7","version_end_inclusive":true,"cpe23_uri":"cve5:yamcs:yamcs:< 5.12.7:< 5.12.7"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-vmwp-vh32-rj75","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/yamcs/yamcs/commit/3c550348f866af4675d2ba4a51d8d12b7c7c6011","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/yamcs/yamcs/commit/4ff8fda642ea8c3309a4d3f379aa77b763148992","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-07-16T16:06:39.148000Z","label":"CVE published","source":null},{"type":"ssvc_changed","at":"2026-07-16T18:36:28.548916Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-07-16T18:36:28.548916Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-07-16T18:36:28.548916Z","label":"SSVC decision revised","source":"vulnrichment"}]}