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Review reviewCritical

CVE-2026-42880

argoproj argo-cd, Red Hat OpenShift GitOps 1.19, Red Hat OpenShift GitOps 1.2

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
9.6
EPSS
0.51%
40.4% percentile
CISA KEV
Not listed
Published
2026.05.08
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.51%
Technical severityCVSS 9.6

Vulnerability overview

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.

Affected product and versions

Product
argoproj argo-cd, Red Hat OpenShift GitOps 1.19, Red Hat OpenShift GitOps 1.2
Affected versions
>= >= 3.2.0, < 3.2.11, >= >= 3.3.0, < 3.3.9, >= 3.2.0 < 3.2.11, >= 3.3.0 < 3.3.9
Fixed versions
3.2.11, 3.3.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that argoproj argo-cd, Red Hat OpenShift GitOps 1.19, Red Hat OpenShift GitOps 1.2 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE
CWE-200, CWE-201, CWE-212