Yamcs: Authenticated RCE via StreamSQL aggregate-compiler column-name injection in Yamcs `executeSql`
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.1epss 0.7%
from disclosure to weapon0 days
Published on NVDAug 28
1st PoCJul 15
exploitation probability
0.7%top 50% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs allows a user with SystemPrivilege.ControlArchiving to create a double-quoted StreamSQL column name that is interpolated into generated Java source by Expression.fillCode_InputDefVars and Expression.sanitizeName. A sum aggregate reaches yamcs-core/src/main/java/org/yamcs/yarch/streamsql/CompilableAggregateExpression.java and yamcs-core/src/main/java/org/yamcs/yarch/streamsql/funct/SumExpression.java through SelectExpression.compile, where Janino SimpleCompiler.cook compiles the injected source. POST /api/archive/{instance}:executeSql can therefore execute arbitrary Java in the Yamcs server process, exposing mission data and credentials and permitting telemetry tampering or denial of service. This issue is fixed in versions 5.12.8 and 5.13.2.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
yamcs · yamcspublic PoCs found — 1
githubgithub.com/junfuture1103/CVE-2026-55511★ 1⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://github.com/yamcs/yamcs/commit/8c1070b12c0a6c003903325cb2a1013347e2dbdehttps://github.com/yamcs/yamcs/commit/b65a3d78178ba99a58b753feda6ecc3b5a694f13https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2https://github.com/yamcs/yamcs/security/advisories/GHSA-3g44-3m7x-cgg2