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CVE-2026-42880

Argoproj Argo Cd information disclosure

9.6 CRITICALPublic exploitEPSS 0.56%
  1. Published7 May 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

Argoproj Argo Cd≥ 3.2.0 < 3.2.11 · ≥ 3.3.0 < 3.3.9

Remediation

Fixed in
Argoproj Argo Cd≥ 3.2.11

References

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Frequently asked

Is CVE-2026-42880 being actively exploited?

CVE-2026-42880 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.56%.

How severe is CVE-2026-42880?

CVE-2026-42880 has a CVSS 3.1 base score of 9.6, rated critical. EPSS estimates a 0.56% probability of exploitation.

Which products are affected by CVE-2026-42880?

Affected products include Argoproj Argo Cd.

How do I fix CVE-2026-42880?

Upgrade affected software to a fixed version, for example Argoproj Argo Cd 3.2.11 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-42880 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.