argoproj argo-cd up to 3.2.11/3.3.9/3.4.1 ServerSideDiff information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, was found in argoproj argo-cd up to 3.2.11/3.3.9/3.4.1. This impacts an unknown function of the component ServerSideDiff. Such manipulation leads to information disclosure. This vulnerability is listed as CVE-2026-45737. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in argoproj argo-cd up to 3.2.11/3.3.9/3.4.1. Affected by this issue is some unknown functionality of the component ServerSideDiff. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From 3.2.0 until 3.2.12, 3.3.10, and 3.4.2, Argo CD ServerSideDiff can expose Kubernetes Secret values embedded in the kubectl.kubernetes.io/last-applied-configuration annotation because HideSecretData(target, live, ...) does not fully sanitize ResourceDiff.TargetState and LiveState predicted live Secret objects, allowing sensitive data, stringData, and annotations to appear in UI or CLI diffs. This issue is fixed in versions 3.2.12, 3.3.10, and 3.4.2.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-45737 since 05/13/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 3.2.12, 3.3.10 or 3.4.2 eliminates this vulnerability.

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Productinfo

Vendor

• argoproj

Name

• argo-cd

Version

• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.2.4
• 3.2.5
• 3.2.6
• 3.2.7
• 3.2.8
• 3.2.9
• 3.2.10
• 3.2.11
• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6
• 3.3.7
• 3.3.8
• 3.3.9
• 3.4.0
• 3.4.1

Website

• Product: https://github.com/argoproj/argo-cd/

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