CVE-2026-42880ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction
Updated under an hour ago ()
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It affects argoproj argo-cd and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
- Weakness (CWE)
- CWE-200, CWE-212, CWE-201
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Modified
- Record last updated
- Sep 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
argoproj argo-cd argoproj:argo_cd (from the name) | from 3.2.0, < 3.2.11; from 3.3.0, < 3.3.9 | CNA record |
Red Hat Red Hat OpenShift GitOps 1.19 redhat:openshift_gitops | from 1779211412 not affected | CISA ADP |
Red Hat Red Hat Openshift Data Foundation 4 redhat:openshift_data_foundation | 4 | CISA ADP |
argoproj argo_cd argoproj:argo_cd | from 3.2.0 before 3.2.11; from 3.3.0 before 3.3.9 | NVD |
References
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3x-refsource-confirm, 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://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.