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CVE-2026-31892

WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode

Published: Mar 11, 2026Updated: Mar 17, 2026 Sources: CVE List NVD GHSACWE-863
NVD MITRE
8.1CVSSHIGH
EPSS Score
0.3%
Top 81.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-863

Affected Products

argo-workflowsargoproj
Mixed
Cloud & SaaS / container-orchestration
argo workflowsargoproj
Mixed
Cloud & SaaS / container-orchestration
github.com/argoproj/argo-workflows/v4GoOSS Libraries
github.com/argoproj/argo-workflows/v3GoOSS Libraries
github.com/argoproj/argo-workflowsGoOSS Libraries
argoprojoss-projectCloud & SaaSaka argo cd, argo-cd, argo workflows, argo workflow
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3wf5-g532-rcrr
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-31892
nvd.nist.gov
https://github.com/argoproj/argo-workflows
github.com

Timeline

Published
Mar 11, 2026
Last Updated
Mar 17, 2026

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