CVE catalog
CVE-2026-40886
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() func
- Severity
- High · CVSS 7.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.38% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | argo_workflows | Not reported | Not reported | unknown |
| Cpe | argo_workflows | Not reported | 3.7.14 | fixed |
| Cpe | argo_workflows | Not reported | 4.0.5 | fixed |
| Cpe | argo_workflows | Not reported | 4.0.5 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | argo_workflows | cpe | Not reported | 3.7.14 | Not reported | Not reported | Not reported |
| Cpe | argo_workflows | cpe | Not reported | 4.0.5 | Not reported | Not reported | Not reported |
| Cpe | argo_workflows | cpe | Not reported | 4.0.5 | Not reported | NVD-CVE-2026-40886 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://access.redhat.com/security/cve/CVE-2026-40886]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2461236]
- [https://github.com/argoproj/argo-workflows/security/advisories/GHSA-5jv8-h7qh-rf5p]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-40886]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40886.json]
[FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]