CVE-2026-42296 — HIGH (8.1)

Q: How severe is CVE-2026-42296?

CVE-2026-42296 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-42296?

Check the references section above for vendor advisories and patch information. Affected products include: Argoproj Argo Workflows.

Vulnerability 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.

CVSS Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Argoproj	Argo Workflows	< 3.7.14

Related Weaknesses (CWE)

CWE-863

References

https://github.com/argoproj/argo-workflows/commit/534f4ff1cbd86908e8ff76d97d553aPatch
https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14Release Notes
https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5Release Notes
https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rExploitMitigationVendor Advisory
https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rExploitMitigationVendor Advisory

FAQ

What is CVE-2026-42296?

CVE-2026-42296 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 t...

How severe is CVE-2026-42296?

CVE-2026-42296 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42296?

Check the references section above for vendor advisories and patch information. Affected products include: Argoproj Argo Workflows.