{"cve":"CVE-2026-46562","nvd":{"published":"2026-07-16T17:16:56.953","modified":"2026-07-20T01:53:17.737","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-94","CWE-95","CWE-470"],"references":["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","https://github.com/yamcs/yamcs/security/advisories/GHSA-vmwp-vh32-rj75"],"products":["spaceapplications:yamcs"],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-46562","score":0.00976,"percentile":0.62111,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vmwp-vh32-rj75","url":"https://osv.dev/vulnerability/GHSA-vmwp-vh32-rj75","summary":"Yamcs Vulnerable to Remote Code Execution via Mission Database algorithm override","modified":"2026-05-27T23:11:26.022781Z","packages":[{"ecosystem":"Maven","name":"org.yamcs:yamcs-core","purl":"pkg:maven/org.yamcs/yamcs-core","ranges":["<5.12.7"],"fixed":["5.12.7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}