CVE-2026-42880

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.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3	Exploit Vendor Advisory
https://access.redhat.com/errata/RHBA-2026:12433
https://access.redhat.com/errata/RHSA-2026:20943
https://access.redhat.com/errata/RHSA-2026:20947
https://access.redhat.com/security/cve/CVE-2026-42880
https://bugzilla.redhat.com/show_bug.cgi?id=2467882
https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3	Exploit Vendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:argoproj:argo_cd::::::::
	cpe:2.3:a:argoproj:argo_cd::::::::

History

No history.

Information

Published : 2026-05-07 23:16

Updated : 2026-09-07 13:19

NVD link : CVE-2026-42880

Mitre link : CVE-2026-42880

CVE.ORG link : CVE-2026-42880

JSON object : View

Products Affected

argoproj

argo_cd

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-212

Improper Removal of Sensitive Information Before Storage or Transfer

CWE-201

Insertion of Sensitive Information Into Sent Data

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