CVE-2026-32604

Critical

Published: 20 April 2026

Published

20 April 2026

Modified

23 April 2026

KEV Added

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Patch

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CVSS Score 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Score 0.0008 23.6th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-32604 is a critical-severity Improper Input Validation (CWE-20) vulnerability in Linuxfoundation Spinnaker. Its CVSS base score is 9.9 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 23.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly addresses the CWE-20 improper input validation flaw that enables arbitrary command execution on clouddriver pods.

SI-2 Flaw Remediation good match

prevent

Ensures timely remediation through patching to the fixed Spinnaker versions (2026.1.0, 2026.0.1, 2025.4.2, 2025.3.2).

AC-6 Least Privilege partial match

prevent

Limits the impact of exploitation by enforcing least privilege, restricting damage from low-privileged (PR:L) arbitrary command execution.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1059.004 Unix Shell Execution

Adversaries may abuse Unix shell commands and scripts for execution.

attack.mitre.org →

Why these techniques?

CVE enables remote arbitrary command execution on Spinnaker clouddriver pods via network-reachable improper input validation (CWE-20), directly mapping to exploitation of public-facing applications (T1190) and subsequent Unix shell command execution (T1059.004).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

Spinnaker is an open source, multi-cloud continuous delivery platform. In versions prior to 2026.1.0, 2026.0.1, 2025.4.2, and 2025.3.2, a bad actor can execute arbitrary commands very simply on the clouddriver pods. This can expose credentials, remove files, or inject resources…

easily. Versions 2026.1.0, 2026.0.1, 2025.4.2, and 2025.3.2 contain a patch. As a workaround, disable the gitrepo artifact types.

Deeper analysisAI

CVE-2026-32604, published on 2026-04-20, is a vulnerability in Spinnaker, an open-source multi-cloud continuous delivery platform. It affects versions prior to 2026.1.0, 2026.0.1, 2025.4.2, and 2025.3.2, enabling a bad actor to execute arbitrary commands on the clouddriver pods. The issue is classified under CWE-20 (Improper Input Validation) with a CVSS v3.1 base score of 9.9 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).

An attacker requires only low privileges (PR:L) to exploit this over the network (AV:N) with low attack complexity (AC:L), no user interaction (UI:N), and high scope impact (S:C). Exploitation allows arbitrary command execution on clouddriver pods, which can expose credentials, remove files, or inject resources.

Patched versions 2026.1.0, 2026.0.1, 2025.4.2, and 2025.3.2 address the vulnerability, as detailed in their GitHub release notes and the security advisory GHSA-x3j7-7pgj-h87r. A workaround is to disable gitrepo artifact types. Additional context appears in a Zeropath blog post on Spinnaker RCE leading to production compromise.