CVE-2026-42296 Details
Description
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.7.14 and 4.0.5, a user with create Workflow permission can bypass templateReferencing: Strict to get host network access, switch service accounts, override pod security context, add tolerations to schedule on control-plane nodes, or enable SA token mounting. This defeats the stated purpose of the feature. The practical impact depends on what Kubernetes-level controls are in place. Clusters with PodSecurity admission or OPA/Gatekeeper would independently block some of these (like hostNetwork). Clusters that rely on Argo's Strict mode as the primary enforcement layer are fully exposed. This issue has been patched in versions 3.7.14 and 4.0.5.
A vulnerability exists in Argo Workflows versions prior to 3.7.14 and 4.0.5, allowing users with create Workflow permissions to bypass the Strict template referencing mode. This bypass enables access to the host network, the ability to switch service accounts, override pod security contexts, add tolerations for scheduling on control-plane nodes, or enable service account token mounting. The issue arises because the Strict mode only checks for the presence of a workflow template reference, without inspecting other fields that could override security settings. While some impacts may be mitigated by Kubernetes-level controls, clusters relying on Argo's Strict mode are fully exposed.
Users can update to Argo Workflows versions 3.7.14 or 4.0.5, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 12, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-42296 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2468446 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42296.json | redhat-SADP | |
| https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rp4 | CISA-ADP | ExploitMitigationVendor Advisory |
| https://github.com/argoproj/argo-workflows/commit/534f4ff1cbd86908e8ff76d97d553ad5a49a950d | [email protected] | Patch |
| https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14 | [email protected] | Release Notes |
| https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5 | [email protected] | Release Notes |
| https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rp4 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-863 | Incorrect Authorization | redhat-SADP |
| CWE-863 | Incorrect Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| argoproj argo workflows | < 3.7.14 >= 4.0.0, < 4.0.5 |
CPE
Remediation
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Change History
8 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 15, 2026 | Initial Analysis | [email protected] |
| May 12, 2026 | CVE Modified | CISA-ADP |
| May 9, 2026 | New CVE Received | [email protected] |