CVE-2026-44795: Spinnaker: Non-safe yaml deserialization allowing RCE when using specific types
Impact 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.
Patches 2025.3.3, 2026.0.3 and 2025.4.4.
Workarounds Disable the CloudFormation system and cloudfoundry baking operations.
Resources Join Spinnaker on Slack for more information!
Other sources
Spinnaker is an open source, multi-cloud continuous delivery platform. Prior to 2026.1.0, 2026.0.3, 2025.4.4, and 2025.3.3, unsafe YAML processing bypasses safe deserialization when using CloudFormation deployments or CloudFoundry baking. The use of a non-safe constructor allows arbitrary loading of Java classes, leading to remote code execution. This issue is fixed in versions 2026.1.0, 2026.0.3, 2025.4.4, and 2025.3.3.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
maven/io.spinnaker.orca:orca-coreto a version that resolves this vulnerability.Fixed in 2026.0.3 - Upgrade
Upgrade
maven/io.spinnaker.orca:orca-coreto a version that resolves this vulnerability.Fixed in 2025.4.4 - Upgrade
Upgrade
maven/io.spinnaker.rosco:rosco-coreto a version that resolves this vulnerability.Fixed in 2026.0.3 - Upgrade
Upgrade
maven/io.spinnaker.rosco:rosco-coreto a version that resolves this vulnerability.Fixed in 2025.4.4 - Upgrade
Upgrade
maven/io.spinnaker.orca:orca-coreto a version that resolves this vulnerability.Fixed in 2025.3.3 - Upgrade
Upgrade
maven/io.spinnaker.rosco:rosco-coreto a version that resolves this vulnerability.Fixed in 2025.3.3 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 2026.1.0 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 2026.0.3 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 2025.4.4 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 2025.3.3 - Compensating control
Disable the CloudFormation system and cloudfoundry baking operations to avoid unsafe YAML processing bypass during CloudFormation deployments or CloudFoundry baking.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-44795?
The severity of CVE-2026-44795 is high, rated at 8.5.
What type of vulnerability is CVE-2026-44795?
CVE-2026-44795 is an unsafe YAML processing vulnerability that allows arbitrary loading of Java classes.
How does CVE-2026-44795 affect cloud services?
CVE-2026-44795 impacts users during CloudFormation deployments and CloudFoundry Baking.
What is the risk associated with CVE-2026-44795?
CVE-2026-44795 has a risk score of 55.
How do I mitigate CVE-2026-44795?
To mitigate CVE-2026-44795, users should apply the available patches and avoid using non-safe constructors.