CVEvulnerability
CVE-2026-46621
9.1 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-16
- Last modified
- 2026-07-20
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-94
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.
Affected configurations
• spaceapplications yamcs (< 5.12.7)
Related
Weakness · CWE (1)
- CWE-94 Improper Control of Generation of Code weakness
References
- https://github.com/yamcs/yamcs/commit/3c550348f866af4675d2ba4a51d8d12b7c7c6011 Patch
- https://github.com/yamcs/yamcs/commit/4ff8fda642ea8c3309a4d3f379aa77b763148992 Patch
- https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7 Release Notes
- https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0 Release Notes
- https://github.com/yamcs/yamcs/security/advisories/GHSA-2g95-6x5q-xjwj Exploit, Vendor Advisory
- https://github.com/yamcs/yamcs/security/advisories/GHSA-2g95-6x5q-xjwj Exploit, Vendor Advisory