Vulnerability details
CVE-2026-42880
Red Hat Openshift Data Foundation 4argoproj Argo CD
ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction
CVSS 3.1
9.6Critical
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.6Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N |
| 7.7High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Red Hat | Red Hat Openshift Data Foundation 4 | All | CVEProject cvelistV5 (CNA) |
| argoproj | Argo CD | >= 3.2.0, < 3.2.11 | CVEProject cvelistV5 (CNA) |
| argoproj | Argo CD | >= 3.3.0, < 3.3.9 | CVEProject cvelistV5 (CNA) |
References and advisories
7- https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3 x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2026-42880 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2467882 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:20943 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:20947 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHBA-2026:12433 vendor-advisoryx_refsource_REDHAT
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Details
- Published
- 2026-05-08
- Last updated
- 2026-09-07
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.64%
Probability of exploitation in 30 days
51.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-200Exposure of Sensitive Information to an Unauthorized Actor
- CWE-212Improper Removal of Sensitive Information Before Storage or Transfer
- CWE-201Insertion of Sensitive Information Into Sent Data