ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction_CVE-2026-42880

9.6 / 10

CRITICAL

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

Description

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and 3.3.0 to before 3.3.9, there is a missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint that allows an attacker with read-only access to extract plaintext Kubernetes Secret data from etcd via the Kubernetes API server's Server-Side Apply dry-run mechanism. This issue has been patched in versions 3.2.11 and 3.3.9.

AI Analysis

Missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint allows an attacker with read-only access to extract plaintext Kubernetes Secret data

Basic Information

ID CVE-2026-42880

Source GitHub_M

Published May 7, 2026 at 22:20

Affected Product

Vendor argoproj

Product argo-cd

Version >= 3.2.0, < 3.2.11

Affected Versions argoproj argo-cd >= 3.2.0, < 3.2.11
argoproj argo-cd >= 3.3.0, < 3.3.9

CWE Classification

CWE-200 CWE-212

AI Assessment

AI Score 9.6 / 10

AI Severity Critical

Vendor Argo

Product Argo CD

Version 3.2.0-3.2.10, 3.3.0-3.3.8

References

github.com /argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3

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