{"cve":"CVE-2026-46621","nvd":{"published":"2026-07-16T17:16:57.090","modified":"2026-07-20T01:46:21.317","status":"Analyzed","description":"Yamcs is a mission control framework. Prior to 5.12.7, the Yamcs script evaluation engine for Python algorithms dynamically compiled and evaluated user-controlled algorithm text using Jython through the JSR-223 ScriptEngine API without enforcing a secure sandbox, so an authenticated user with the ChangeMissionDatabase privilege could override an existing Python algorithm's logic through the mission database REST API and import and execute arbitrary Java classes such as java.lang.Runtime to achieve remote code execution on the underlying host operating system. 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:H/UI:N/S:C/C:H/I:H/A:H","score":9.1},"cwes":["CWE-94"],"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-2g95-6x5q-xjwj"],"products":["spaceapplications:yamcs"],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-46621","score":0.01116,"percentile":0.66087,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2g95-6x5q-xjwj","url":"https://osv.dev/vulnerability/GHSA-2g95-6x5q-xjwj","summary":"Yamcs Vulnerable to Authenticated Remote Code Execution (RCE) via Jython Algorithm Code Injection","modified":"2026-05-27T23:11:26.160321Z","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."]}