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Critical · 9.9 CVE-2026-55565 EUVD-2026-67844GHSA-c64q-hj4j-375f

Yamcs: Authenticated remote code execution via unescaped StreamSQL `LIKE` pattern compiled by Janino (`LikeExpression`)

Published Aug 28, 2026 · Updated Aug 31, 2026 · Assigned by GitHub_M

Description

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs LikeExpression.fillCode_getValueReturn in yamcs-core/src/main/java/org/yamcs/yarch/streamsql/LikeExpression.java inserts an unescaped LIKE pattern into Java source compiled by Expression.getCompiledExpression through SimpleCompiler.cook instead of applying ValueExpression.escapeJavaString. The pattern can originate from POST /api/archive/{instance}:executeSql, POST /api/archive/{instance}:streamSql, POST /api/archive/{instance}/tables/{table}:readRows, GET /api/archive/{instance}/events, or activity searches, including paths available with ReadTables, ReadEvents, or ReadActivities. A quote in the pattern can inject Java that runs as the Yamcs server process. This issue is fixed in versions 5.12.8 and 5.13.2.

Affected products

VendorProductAffectedFixed
yamcs yamcs < 5.12.8, >= 5.13.0, < 5.13.2 —

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.yamcs:yamcs-core >= 5.13.0, < 5.13.2 5.13.2 GHSA-c64q-hj4j-375f
Maven org.yamcs:yamcs-core < 5.12.8 5.12.8 GHSA-c64q-hj4j-375f

References