{"id":"BIT-argo-workflows-2026-40886","summary":"Argo Workflows: Unchecked annotation parsing in pod informer crashes Argo Workflows controller","details":"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.","aliases":["CVE-2026-40886","GHSA-5jv8-h7qh-rf5p","GO-2026-5148"],"modified":"2026-09-08T08:45:49.347682317Z","published":"2026-04-25T08:35:39.954Z","database_specific":{"cpes":["cpe:2.3:a:argo_workflows_project:argo_workflows:*:*:*:*:*:kubernetes:*:*"],"severity":"High"},"references":[{"type":"ADVISORY","url":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-5jv8-h7qh-rf5p"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40886"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-40886"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2461236"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40886.json"}],"affected":[{"package":{"name":"argo-workflows","ecosystem":"Bitnami","purl":"pkg:bitnami/argo-workflows"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.6.5"},{"fixed":"3.7.14"},{"introduced":"4.0.0"},{"fixed":"4.0.5"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/argo-workflows/BIT-argo-workflows-2026-40886.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"}]}],"schema_version":"1.9.0"}