Spinnaker has 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!
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.spinnaker.orca:orca-core | < 2025.3.3, >= 2025.4.0, < 2025.4.4, >= 2026.0.0, < 2026.0.3 | 2025.3.3, 2025.4.4, 2026.0.3 |
| Java / Kotlin (Maven) | io.spinnaker.rosco:rosco-core | < 2025.3.3, >= 2025.4.0, < 2025.4.4, >= 2026.0.0, < 2026.0.3 | 2025.3.3, 2025.4.4, 2026.0.3 |
References
- https://github.com/spinnaker/spinnaker/security/advisories/GHSA-c8q4-9h32-2ww8
- https://nvd.nist.gov/vuln/detail/CVE-2026-44795
- https://github.com/spinnaker/spinnaker/commit/4cbe1d5fea9df573aadfd8b093fb4b594b354ee5
- https://github.com/spinnaker/spinnaker/commit/e57c0db4584b398473a7bbb19402ce6c1e89b627
- https://github.com/spinnaker/spinnaker/commit/f69d7b534d068ed74d0d3a1fbf17e2c945d36e5e
- https://github.com/spinnaker/spinnaker
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N- Weakness (CWE)
CWE-470, CWE-502- Platform
- Java / Kotlin (Maven)
- Package
io.spinnaker.orca:orca-core, io.spinnaker.rosco:rosco-core- Disclosed
- 22.06.2026
- Updated
- 11.10.2026 13:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-c8q4-9h32-2ww8 - CC BY 4.0
Vulnerability history: io.spinnaker.orca:orca-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 03.2026 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 1
Disclosures per year
- 2026: 2
-
Spinnaker has non-safe yaml deserialization, allowing RCE when using specific types this entry
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