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TI-2026-30603 Aliases CVE-2026-42294GHSA-jcc8-g2q4-9fxq

Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor

Priority HIGH 75CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.

Summary

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, the Webhook Interceptor loads the entire request body into memory before authenticating the request or verifying its signature. This occurs on the /api/v1/events/ endpoint, which is publicly accessible (albeit intended for webhooks). An attacker can send a request with an extremely large body (e.g., multiple gigabytes), causing the Argo Server to allocate excessive memory, potentially leading to an Out-Of-Memory (OOM) crash and denial of service. This issue has been patched in versions 3.7.14 and 4.0.5.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00599 48th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed argo-workflows (argoproj): 3.7.14, 4.0.5github.com/argoproj/argo-workflows/v3 (Go): 3.7.14+1 more productRed Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
argoprojargo-workflowsbefore 3.7.14; 4.0.0 to before 4.0.53.7.14, 4.0.5Patch availableCNA
—github.com/argoproj/argo-workflows/v3 (Go)before 3.7.143.7.14Patch availableGHSA-jcc8-g2q4-9fxq
—github.com/argoproj/argo-workflows/v4 (Go)4.0.0 to before 4.0.54.0.5Patch availableGHSA-jcc8-g2q4-9fxq
  • argo-workflows Vendorargoproj Affected before 3.7.14; 4.0.0 to before 4.0.5 Fixed in 3.7.14, 4.0.5 Patch available CNA
  • github.com/argoproj/argo-workflows/v3 (Go) Vendor— Affected before 3.7.14 Fixed in 3.7.14 Patch available GHSA-jcc8-g2q4-9fxq
  • github.com/argoproj/argo-workflows/v4 (Go) Vendor— Affected 4.0.0 to before 4.0.5 Fixed in 4.0.5 Patch available GHSA-jcc8-g2q4-9fxq

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*before 3.7.14; 4.0.0 to before 4.0.5Vulnerableargoproj
  • cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:* Versions before 3.7.14; 4.0.0 to before 4.0.5 Vulnerable ·argoproj

Remediation

  • Fix · CNA argo-workflows (argoproj) Fixed in 3.7.14, 4.0.5
  • Fix · GHSA-jcc8-g2q4-9fxq github.com/argoproj/argo-workflows/v3 (Go) Fixed in 3.7.14 Advisory →
  • Fix · GHSA-jcc8-g2q4-9fxq github.com/argoproj/argo-workflows/v4 (Go) Fixed in 4.0.5 Advisory →

Red Hat 1 advisory

  • RHSA-2026:73987 Released 2026-09-30 · Red Hat rating Critical
    RHOAI 3.3.7 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-argo-argoexec-rhel9 +47

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift AI 3.3Fixed RHSA-2026:73987
Not affected: 1 product
  • Red Hat OpenShift AI 3.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42294
  2. 2026-10-03 Alias added: GHSA-jcc8-g2q4-9fxq
  3. 2026-10-07 Fix available: RHSA-2026:73987 · Red Hat
  4. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

Patch 1

Advisory 1

Other 6

  • TI-2026-22564 Argo Workflows has unauthorized access to Argo Workflows Template CVSS 3.1CRITICAL 9.8
  • TI-2026-39371 Argo Workflows: Incomplete fix for CVE-2026-31892: ArtifactGC.PodSpecPatch bypass of Strict/Secure templateReferencing CVSS 4.0HIGH 8.9
  • TI-2026-24444 WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode CVSS 4.0HIGH 8.9
  • TI-2026-30604 Argo Workflows: Exposure of artifact repository credentials CVSS 4.0HIGH 8.5
  • TI-2025-38478 argo-workflows Zip Slip path traversal allows arbitrary file write and container configuration overwrite CVSS 3.1HIGH 8.8
  • TI-2026-30606 Argo Workflows Is Missing Authorization in Sync ConfigMap Provider CVSS 4.0HIGH 8.5
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences