CVE-2026-44795
Spinnaker: Non-safe yaml deserialization allowing RCE when using specific types
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Spinnaker: Non-safe yaml deserialization allowing RCE when using specific types
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.
- Record
CVE-2026-44795- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-470, CWE-502
- Updated
- 2026-11-02
EUVDEUVD-2026-43086
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.
- Record
EUVD-2026-43086- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c8q4-9h32-2ww8
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!
- Record
GHSA-c8q4-9h32-2ww8- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N - Weakness
- CWE-470, CWE-502
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-44795- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-470, CWE-502
- Updated
- 2026-11-02
OSV
Spinnaker: Non-safe yaml deserialization allowing RCE when using specific types
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.
- Record
CVE-2026-44795- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-470, CWE-502
- Updated
- 2026-11-02
OSVGHSA-c8q4-9h32-2ww8
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!
- Record
GHSA-c8q4-9h32-2ww8- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N - Weakness
- CWE-470, CWE-502
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
io.spinnaker.rosco:rosco-coreMaven |
before 2025.3.3 | 2025.3.3 |
io.spinnaker.orca:orca-coreMaven |
before 2025.3.3 | 2025.3.3 |
io.spinnaker.rosco:rosco-coreMaven |
2025.4.0 up to 2025.4.4 | 2025.4.4 |
io.spinnaker.rosco:rosco-coreMaven |
2026.0.0 up to 2026.0.3 | 2026.0.3 |
io.spinnaker.orca:orca-coreMaven |
2025.4.0 up to 2025.4.4 | 2025.4.4 |
io.spinnaker.orca:orca-coreMaven |
2026.0.0 up to 2026.0.3 | 2026.0.3 |
io.spinnaker.rosco:rosco-coreMaven |
before 2025.3.3, plus listed versions 1.10.01.11.01.12.01.12.11.12.2 Show 45 moreShow less1.12.31.12.41.13.01.13.11.13.21.13.31.13.41.14.01.15.01.16.01.17.01.17.11.17.21.18.01.18.11.18.21.19.01.19.11.20.01.20.11.20.21.20.31.21.01.21.11.22.01.22.11.22.21.23.01.23.11.24.01.25.01.26.01.7.21.7.31.7.41.7.51.7.61.7.71.7.81.8.01.8.0-rc.11.8.0-rc.101.8.0-rc.111.8.0-rc.121.8.0-rc.2 |
2025.3.3 |
io.spinnaker.orca:orca-coreMaven |
before 2025.3.3, plus listed versions 2025.0-02025.0-12025.0-102025.0-122025.0-13 Show 45 moreShow less2025.0-142025.0-152025.0-162025.0-172025.0-182025.0-192025.0-22025.0-202025.0-212025.0-222025.0-232025.0-242025.0-252025.0-32025.0-42025.0-52025.0-62025.0-72025.0-82025.0-92025.0.02025.0.12025.0.22025.0.32025.0.42025.0.52025.0.62025.0.72025.0.82025.1-02025.1-12025.1-102025.1-112025.1-122025.1-132025.1-142025.1-152025.1-162025.1-172025.1-182025.1-192025.1-22025.1-202025.1-212025.1-22 |
2025.3.3 |
io.spinnaker.rosco:rosco-coreMaven |
2025.4.0 up to 2025.4.4, plus listed versions 2025.4-02025.4-12025.4-102025.4-112025.4-12 Show 20 moreShow less2025.4-132025.4-142025.4-152025.4-162025.4-172025.4-182025.4-192025.4-22025.4-202025.4-212025.4-32025.4-42025.4-52025.4-62025.4-72025.4-82025.4-92025.4.12025.4.22025.4.3 |
2025.4.4 |
io.spinnaker.rosco:rosco-coreMaven |
2026.0.0 up to 2026.0.3, plus listed versions 2026.0-02026.0-12026.0-102026.0-112026.0-12 Show 21 moreShow less2026.0-132026.0-142026.0-152026.0-162026.0-172026.0-182026.0-192026.0-22026.0-202026.0-212026.0-222026.0-232026.0-32026.0-42026.0-52026.0-62026.0-72026.0-82026.0-92026.0.12026.0.2 |
2026.0.3 |
io.spinnaker.orca:orca-coreMaven |
2025.4.0 up to 2025.4.4, plus listed versions 2025.4-02025.4-12025.4-102025.4-112025.4-12 Show 20 moreShow less2025.4-132025.4-142025.4-152025.4-162025.4-172025.4-182025.4-192025.4-22025.4-202025.4-212025.4-32025.4-42025.4-52025.4-62025.4-72025.4-82025.4-92025.4.12025.4.22025.4.3 |
2025.4.4 |
io.spinnaker.orca:orca-coreMaven |
2026.0.0 up to 2026.0.3, plus listed versions 2026.0-02026.0-12026.0-102026.0-112026.0-12 Show 21 moreShow less2026.0-132026.0-142026.0-152026.0-162026.0-172026.0-182026.0-192026.0-22026.0-202026.0-212026.0-222026.0-232026.0-32026.0-42026.0-52026.0-62026.0-72026.0-82026.0-92026.0.12026.0.2 |
2026.0.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-44795 is a high vulnerability (CVSS 8.8) in Linuxfoundation Spinnaker, published June 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.01%, the 63rd percentile. Fixed in io.spinnaker.rosco:rosco-core 2025.3.3.
References
github.com/spinnaker/spinnaker/security/advisories/GHSA-c8q4-9h32-2ww8
nvd.nist.gov/vuln/detail/CVE-2026-44795
Left out here: 872 versions. The JSON record has them.