Arbitrary Code Injection Affecting org.yamcs:yamcs-core package, versions [,5.12.7)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JAVA-ORGYAMCS-17230855
- published8 Jun 2026
- disclosed27 May 2026
- creditPablo Picurelli Ortiz
Introduced: 27 May 2026
NewCVE-2026-46621 (opens in a new tab)How to fix?
Upgrade org.yamcs:yamcs-core to version 5.12.7 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection via the dynamic evaluation of user-supplied algorithm code in the script evaluation engine. An attacker can execute arbitrary operating system commands by injecting malicious Jython code through the REST API when authenticated with the required privileges.
Note:
This is only exploitable if the attacker has the ChangeMissionDatabase privilege and the Jython engine is present in the classpath, and there is an existing algorithm with its language set to Python.