Yamcs up to 5.12.7/5.13.1 Janino LikeExpression os command injection

Summaryinfo

A vulnerability was found in Yamcs up to 5.12.7/5.13.1 and classified as critical. This affects the function LikeExpression of the component Janino. Executing a manipulation can lead to os command injection. This vulnerability appears as CVE-2026-55565. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in Yamcs up to 5.12.7/5.13.1 and classified as critical. This vulnerability affects the function LikeExpression of the component Janino. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-55565 since 06/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 5.12.8 or 5.13.2 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Yamcs

Version

• 5.12.0
• 5.12.1
• 5.12.2
• 5.12.3
• 5.12.4
• 5.12.5
• 5.12.6
• 5.12.7
• 5.13.0
• 5.13.1

Website

• Product: https://github.com/yamcs/yamcs/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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