High 7.7Published Apr 23, 2026

CVE-2026-40886Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes.

Updated under an hour ago (2026-10-19 09:50 UTC)

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It affects argoproj argo_workflows. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for argoproj argo_workflows

Exploited in the last 30 days

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From 3.6.5 to 4.0.4, an unchecked array index in the pod informer's podGCFromPod() function causes a controller-wide panic when a workflow pod carries a malformed workflows.argoproj.io/pod-gc-strategy annotation. Because the panic occurs inside an informer goroutine (outside the controller's recover() scope), it crashes the entire controller process. The poisoned pod persists across restarts, causing a crash loop that halts all workflow processing until the pod is manually deleted. This vulnerability is fixed in 4.0.5 and 3.7.14.

CVSS: 7.7 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Weakness (CWE): CWE-129, CWE-1285
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

argoproj argo_workflows argoproj:argo_workflows	from 3.6.5 through 3.6.19; from 3.7.0 before 3.7.14; from 4.0.0 before 4.0.5	NVD

References

https://github.com/argoproj/argo-workflows/security/advisories/GHSA-5jv8-h7qh-rf5pexploit, vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-40886
https://bugzilla.redhat.com/show_bug.cgi?id=2461236
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40886.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.