CVE-2026-31892highCWE-807CWE-863

CVE-2026-31892: high-severity vulnerability in argoproj argo-workflows

WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.9epss 0.7%
exploitation probability
0.7%top 50% of all CVEs
observed exploitation
nono source reports it
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From 2.9.0 to before 4.0.2 and 3.7.11, A user who can submit Workflows can completely bypass all security settings defined in a WorkflowTemplate by including a podSpecPatch field in their Workflow submission. This works even when the controller is configured with templateReferencing: Strict, which is specifically documented as a mechanism to restrict users to admin-approved templates. The podSpecPatch field on a submitted Workflow takes precedence over the referenced WorkflowTemplate during spec merging and is applied directly to the pod spec at creation time with no security validation. This vulnerability is fixed in 4.0.2 and 3.7.11.
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H
Affected products
argoproj · argo-workflows
Related CVEs — argoproj argo-workflows

In the same product, most dangerous first.

CVE-2022-29164HIGHPrivilege Escalation in argo-workflowsEPSS 0.9%CVE-2026-28229CRITICALArgo Workflows has unauthorized access to Argo Workflows TemplateEPSS 0.8%CVE-2026-42294HIGHArgo Workflows: Unauthenticated Memory Exhaustion (DoS) in Webhook InterceptorEPSS 0.7%CVE-2025-66626HIGHargoproj/argo-workflows is vulnerable to RCE via ZipSlip and symbolic linksEPSS 0.7%CVE-2024-53862MEDIUMArgo Workflows Allows Access to Archived Workflows with Fake Token in `client` modeEPSS 0.7%CVE-2026-40886HIGHArgo Workflows: Unchecked annotation parsing in pod informer crashes Argo Workflows controllerEPSS 0.6%
References
https://access.redhat.com/errata/RHSA-2026:10184https://access.redhat.com/security/cve/CVE-2026-31892https://bugzilla.redhat.com/show_bug.cgi?id=2446551https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3wf5-g532-rcrrhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31892.json