Answer in brief
CVE-2026-55511 records a Critical severity (CVSS 9.1) vulnerability in Yamcs: Authenticated RCE via StreamSQL aggregate-compiler column-name injection in Yamcs `executeSql`. The current sources do not mark it as known exploited. The current feed maps yamcs/yamcs (generic), org.yamcs:yamcs-core (maven), org.yamcs:yamcs-core (maven), org.yamcs:yamcs-core (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps yamcs/yamcs (generic), org.yamcs:yamcs-core (maven), org.yamcs:yamcs-core (maven), org.yamcs:yamcs-core (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| yamcs/yamcsgeneric | < 5.12.8 || >= 5.13.0, < 5.13.2 | Not reported |
| org.yamcs:yamcs-coremaven | >=5.13.0,<=5.13.1 | 5.13.2 |
| org.yamcs:yamcs-coremaven | <=5.12.7 | 5.12.8 |
| org.yamcs:yamcs-coremaven | >=5.13.0 <5.13.2 | 5.13.2 |
| org.yamcs:yamcs-coremaven | >=0 <5.12.8 | 5.12.8 |
Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 28, 2026
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.
Quoted source text, attributed separately from HOL analysis.