Yamcs up to 5.12.6 Engine org.yamcs injection

Summaryinfo

A vulnerability was found in Yamcs up to 5.12.6. It has been rated as problematic. The affected element is an unknown function of the file org.yamcs of the component Engine. This manipulation causes injection. This vulnerability is handled as CVE-2026-44632. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Yamcs up to 5.12.6 and classified as problematic. Affected by this vulnerability is an unknown function of the file org.yamcs of the component Engine. The manipulation with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Yamcs is a mission control framework. Prior to 5.12.7, a server-side code injection vulnerability existed in the Yamcs algorithm evaluation engine org.yamcs.algorithms.JavaExprAlgorithmExecutionFactory, which dynamically compiled and evaluated user-controlled algorithm text through the Janino compiler without enforcing a secure sandbox, so an authenticated user with the ChangeMissionDatabase privilege could override an existing algorithm's text via the mission database REST API and inject Java code (for example using 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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-44632 since 05/07/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation needs additional levels of successful authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1055 for this issue.

Upgrading to version 5.12.7 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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

Website

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

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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