CVE-2026-44795: Spinnaker has uon-safe yaml deserialization, allowing RCE when using specific types

June 22, 2026

There’s an unsafe YAML processing vulnerability that bypasses safe deserialization. This impacts users when when performing:

CloudFormation deployments
CloudFoundry Baking

The usage of a non-safe constructor use allows arbitrary loading of Java classes leading to RCE.

References

github.com/advisories/GHSA-c8q4-9h32-2ww8
github.com/spinnaker/spinnaker/security/advisories/GHSA-c8q4-9h32-2ww8
nvd.nist.gov/vuln/detail/CVE-2026-44795

Code Behaviors & Features

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