CVE-2026-55175: Spinnaker Improper Yaml Processing On Kustomize Vulnerability

HIGH
Advisory Identifier: GHSA-p68j-q7hf-3qcp
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CVSS 7.5
CWE-502
Published
Advisory Summary

CVE-2026-55175 is a HIGH (CVSS 7.5) improper yaml processing on kustomize vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Spinnaker libraries in the Maven ecosystem. The issue involves improper yaml processing on kustomize bake operations. Remediation is available by upgrading affected packages to version 2025.3.4, 2025.4.4, 2026.0.3, 2026.1.1.

CVE-2026-55175 at a Glance

CVE Identifier CVE-2026-55175
GHSA Identifier GHSA-p68j-q7hf-3qcp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Spinnaker
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-55175

To remediate this vulnerability, upgrade all affected Spinnaker dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

io.spinnaker.rosco:rosco-manifests fixed: 2025.3.4 
<dependency>
    <groupId>io.spinnaker.rosco</groupId>
    <artifactId>rosco-manifests</artifactId>
    <version>2025.3.4</version>
</dependency>
io.spinnaker.rosco:rosco-manifests fixed: 2025.4.4 
<dependency>
    <groupId>io.spinnaker.rosco</groupId>
    <artifactId>rosco-manifests</artifactId>
    <version>2025.4.4</version>
</dependency>
io.spinnaker.rosco:rosco-manifests fixed: 2026.0.3 
<dependency>
    <groupId>io.spinnaker.rosco</groupId>
    <artifactId>rosco-manifests</artifactId>
    <version>2026.0.3</version>
</dependency>
io.spinnaker.rosco:rosco-manifests fixed: 2026.1.1 
<dependency>
    <groupId>io.spinnaker.rosco</groupId>
    <artifactId>rosco-manifests</artifactId>
    <version>2026.1.1</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=io.spinnaker.rosco

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-55175, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=io.spinnaker.rosco

Analyze the terminal output to locate any version of Spinnaker in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2025.3.4), your application is affected.

Note: The mvn dependency:tree -Dincludes=io.spinnaker.rosco command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Spinnaker, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact Kustomize bake operations allow unsafe tag processing. This can lead to RCE type exploits on the rosco pods when doing kustomize bakes. This ONLY is possible when using Kustomize. The simple solution is to block kustomize operations and instead use another provider. ### Workarounds Disable kustomize bakes

CVE-2026-55175 Affected Spinnaker Versions

4 component(s)
Fixed Versions:
2025.3.42025.4.42026.0.32026.1.1
Product / Package Ecosystem Affected Versions Fixed Version
io.spinnaker.rosco:rosco-manifests
maven/io.spinnaker.rosco/rosco-manifests
Maven
< 2025.3.4
2025.3.4
io.spinnaker.rosco:rosco-manifests
maven/io.spinnaker.rosco/rosco-manifests
Maven
≥ 2025.4.0
< 2025.4.4
2025.4.4
io.spinnaker.rosco:rosco-manifests
maven/io.spinnaker.rosco/rosco-manifests
Maven
≥ 2026.0.0
< 2026.0.3
2026.0.3
io.spinnaker.rosco:rosco-manifests
maven/io.spinnaker.rosco/rosco-manifests
Maven
≥ 2026.1.0
< 2026.1.1
2026.1.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/spinnaker/spinnaker/security/advisories/GHSA-p68j-q7hf-3qcp
NVD — CVE-2026-55175 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55175
Security Fix Commit FIX COMMIT
https://github.com/spinnaker/spinnaker/commit/2d75818b85cc4c35144d5e5ed45e7340fcab5dfe
Security Fix Commit FIX COMMIT
https://github.com/spinnaker/spinnaker/commit/bbc30c9b9034a056e95f012fa1b34e9fd703cae7
Security Fix Commit FIX COMMIT
https://github.com/spinnaker/spinnaker/commit/de5a7a05af35aee19eb71d289cd0b77f67509009
Security Fix Commit FIX COMMIT
https://github.com/spinnaker/spinnaker/commit/df32d568e82519d9f3896fc9007baba0077c87fd
Security Fix Commit FIX COMMIT
https://github.com/spinnaker/spinnaker/commit/f5cec213f8cf207843ed5a6929395960a1ca094f
Spinnaker Source Repository REPOSITORY
https://github.com/spinnaker/spinnaker
Spinnaker Release RELEASE
https://github.com/spinnaker/spinnaker/releases/tag/rosco-2025.3.4
Spinnaker Release RELEASE
https://github.com/spinnaker/spinnaker/releases/tag/rosco-2025.4.4
Spinnaker Release RELEASE
https://github.com/spinnaker/spinnaker/releases/tag/rosco-2026.0.3
Spinnaker Release RELEASE
https://github.com/spinnaker/spinnaker/releases/tag/rosco-2026.1.1
Spinnaker Release RELEASE
https://github.com/spinnaker/spinnaker/releases/tag/rosco-2026.2.0

Frequently Asked Questions

What is CVE-2026-55175?
CVE-2026-55175 is a security vulnerability in Spinnaker involving Improper yaml processing on kustomize bake operations under CWE-502: Deserialization of Untrusted Data.
Which Spinnaker versions are affected?
Affected versions include releases prior to 2025.3.4, 2025.4.4, 2026.0.3, 2026.1.1 across affected packages: io.spinnaker.rosco:rosco-manifests.
What version fixes CVE-2026-55175?
Upgrading to 2025.3.4, 2025.4.4, 2026.0.3, 2026.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is rosco-manifests affected?
Yes, io.spinnaker.rosco:rosco-manifests is affected in releases prior to 2025.3.4, 2025.4.4, 2026.0.3, 2026.1.1. Upgrade your dependency to 2025.3.4, 2025.4.4, 2026.0.3, 2026.1.1 or later.
What is the CVSS score of CVE-2026-55175?
CVE-2026-55175 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-55175?
CVE-2026-55175 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Maven dependencies for CVE-2026-55175?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=io.spinnaker.rosco'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-p68j-q7hf-3qcp",
  "modified" : "2026-08-28T18:35:06Z",
  "published" : "2026-08-28T18:35:06Z",
  "aliases" : [ "CVE-2026-55175" ],
  "summary" : "Spinnaker: Improper yaml processing on kustomize bake operations",
  "details" : "### Impact\nKustomize bake operations allow unsafe tag processing.  This can lead to RCE type exploits on the rosco pods when doing kustomize bakes.  This ONLY is possible when using Kustomize.  The simple solution is to block kustomize operations and instead use another provider.\n\n### Workarounds\nDisable kustomize bakes",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.spinnaker.rosco:rosco-manifests"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2025.3.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.spinnaker.rosco:rosco-manifests"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2025.4.0"
      }, {
        "fixed" : "2025.4.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.spinnaker.rosco:rosco-manifests"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2026.0.0"
      }, {
        "fixed" : "2026.0.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.spinnaker.rosco:rosco-manifests"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2026.1.0"
      }, {
        "fixed" : "2026.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/security/advisories/GHSA-p68j-q7hf-3qcp"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-55175"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/commit/2d75818b85cc4c35144d5e5ed45e7340fcab5dfe"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/commit/bbc30c9b9034a056e95f012fa1b34e9fd703cae7"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/commit/de5a7a05af35aee19eb71d289cd0b77f67509009"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/commit/df32d568e82519d9f3896fc9007baba0077c87fd"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/commit/f5cec213f8cf207843ed5a6929395960a1ca094f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/spinnaker/spinnaker"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/releases/tag/rosco-2025.3.4"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/releases/tag/rosco-2025.4.4"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/releases/tag/rosco-2026.0.3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/releases/tag/rosco-2026.1.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spinnaker/spinnaker/releases/tag/rosco-2026.2.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-28T18:35:06Z",
    "nvd_published_at" : "2026-07-10T23:16:48Z"
  }
}