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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-42296

35
FAUCET Score

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.

First published: May 9, 2026Last modified: May 9, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 3.7.14CPE matchmatch criteria
cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*
>= 4.0.0, < 4.0.5CPE matchmatch criteria
cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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 Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 23rd percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/argoproj/argo-workflows/v3Fixed in: 3.7.14
gopatch availablevia ghsa
Product: github.com/argoproj/argo-workflows/v4Fixed in: 4.0.5

Vendor Advisories (1)

goGHSA-3775-99mw-8rp4high

Argo has incomplete fix for CVE-2026-31892: hostNetwork, securityContext, serviceAccountName bypass templateReferencing Strict/Secure

May 4, 2026

References

access.redhat.com / security/cve/CVE-2026-42296
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-42296.json
github.com / argoproj/argo-workflows/commit/534f4ff1cbd86908e8ff76d97d553ad5a49a950d
Patch
github.com / argoproj/argo-workflows/releases/tag/v3.7.14
Release Notes
github.com / argoproj/argo-workflows/releases/tag/v4.0.5
Release Notes
github.com / argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rp4
ExploitMitigationVendor Advisory