Yamcs vulnerable to Remote Code Execution via instance-template argument YAML injection (createInstance)

Date Aug 28, 2026

Type Vendor advisory

Signal High-risk advisory

Vendor / Product Maven · org.yamcs:yamcs-core

CVE CVE-2026-55559

High-risk advisory CVE-2026-55559

Summary

Yamcs vulnerable to Remote Code Execution via instance-template argument YAML injection (createInstance)

Why it matters

GitHub has published a reviewed security advisory for org.yamcs:yamcs-core. Prioritize it with other application dependency updates.

Operator check

Check whether org.yamcs:yamcs-core is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

GitHub Advisory GHSA-73mf-m39p-wpm9 NVD — CVE-2026-55559 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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