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NVD / CVE Program· CNA GitHub_M

CVE-2026-42296: Argo Workflows has incomplete fix for CVE-2026-31892: hostNetwork, securityContext, serviceAccountName bypass templateReferencing Strict/Secure

Noroxi assessment

Priority: Monitor (action score 32/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.42% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: github.com/argoproj/argo-workflows/v3 (Go) 3.7.14; github.com/argoproj/argo-workflows/v4 (Go) 4.0.5.

Low priority for now. Upgrade to github.com/argoproj/argo-workflows/v3 (Go) 3.7.14; github.com/argoproj/argo-workflows/v4 (Go) 4.0.5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 8.1 · v3.1—No exploit Fix available
Published
May 9, 2026
Updated
Jul 24, 2026
EPSS
0.4% · 36th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
8.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
argoprojargo workflows

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • argoproj argo workflowsbefore 3.7.14
  • argoproj argo workflows4.0.0 and later · before 4.0.5

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • argoproj argo-workflows

    • < 3.7.14, >= 4.0.0, < 4.0.5affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Gogithub.com/argoproj/argo-workflowsfrom 0—
Gogithub.com/argoproj/argo-workflows/v2from 0—
Gogithub.com/argoproj/argo-workflows/v3before 3.7.143.7.14
Gogithub.com/argoproj/argo-workflows/v4from 4.0.0 · before 4.0.54.0.5

Same product

argoproj: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-54526Argo Workflows: Incomplete fix for CVE-2026-31892: ArtifactGC.PodSpecPatch bypass of Strict/Secure templateReferencing
    35Monitor
  • CVE-2026-31892WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode
    35Monitor
  • CVE-2025-62156argo-workflows Zip Slip path traversal allows arbitrary file write and container configuration overwrite
    35Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-42294May 9, 2026 · Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor
    32Monitor
  • ← EarlierCVE-2026-42295May 9, 2026 · Argo Workflows: Exposure of artifact repository credentials
    34Monitor
  • Later →CVE-2026-42297May 9, 2026 · Argo Workflows Is Missing Authorization in Sync ConfigMap Provider
    34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Go:github.com/argoproj/argo-workflows/v33.7.14Package registry (OSV)
Go:github.com/argoproj/argo-workflows/v44.0.5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-3189259 days apartWorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode
    35Monitor
  • CVE-2026-2822959 days apartArgo Workflows has unauthorized access to Argo Workflows Template
    30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-863 · Incorrect Authorization

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records