CVE-2026-31892

8.9 highEPSS 0.5%

High (8.9) in argoproj argo workflows. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in github.com/argoproj/argo-workflows/v4 4.0.2.

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.

Severity

CVSS 4.0

8.9 high

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

CVSS 3.1

8.1 high

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
CWEs: CWE-863, CWE-807
Published: 2026-03-11
Modified: 2026-07-15
Record from: the NVD, synced 2026-10-19

Affected

argoproj:argo_workflows

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-3wf5-g532-rcrr	Go	github.com/argoproj/argo-workflows/v4	<4.0.2	4.0.2
GHSA-3wf5-g532-rcrr	Go	github.com/argoproj/argo-workflows/v3	<3.7.11	3.7.11
GHSA-3wf5-g532-rcrr	Go	github.com/argoproj/argo-workflows	>=2.9.0	no fix published
GO-2026-4681	Go	github.com/argoproj/argo-workflows	all versions	no fix published
GO-2026-4681	Go	github.com/argoproj/argo-workflows/v2	>=2.9.0	no fix published
GO-2026-4681	Go	github.com/argoproj/argo-workflows/v3	<3.7.11	3.7.11
GO-2026-4681	Go	github.com/argoproj/argo-workflows/v4	<4.0.2	4.0.2

References

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