{"cve":{"cve_id":"CVE-2026-40886","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00293,"epss_percentile":0.2075,"epss_as_of":"2026-06-23","description":"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.","published_at":"2026-04-23T18:12:05.782000Z","last_modified_at":null,"cvss_v3_score":7.7,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-129"],"nvd_references":["https://github.com/argoproj/argo-workflows/security/advisories/GHSA-5jv8-h7qh-rf5p"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:30:13.586728Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"argoproj","vendor_name":"argoproj","product_slug":"argo-workflows","product_name":"argo-workflows","version_start":">= 4.0.0, < 4.0.5","version_start_inclusive":true,"version_end":">= 4.0.0, < 4.0.5","version_end_inclusive":true,"cpe23_uri":"cve5:argoproj:argo-workflows:>= 4.0.0, < 4.0.5:>= 4.0.0, < 4.0.5"},{"vendor_slug":"argoproj","vendor_name":"argoproj","product_slug":"argo-workflows","product_name":"argo-workflows","version_start":">= 3.7.0, < 3.7.14","version_start_inclusive":true,"version_end":">= 3.7.0, < 3.7.14","version_end_inclusive":true,"cpe23_uri":"cve5:argoproj:argo-workflows:>= 3.7.0, < 3.7.14:>= 3.7.0, < 3.7.14"},{"vendor_slug":"argoproj","vendor_name":"argoproj","product_slug":"argo-workflows","product_name":"argo-workflows","version_start":">= 3.6.5, <= 3.6.19","version_start_inclusive":true,"version_end":">= 3.6.5, <= 3.6.19","version_end_inclusive":true,"cpe23_uri":"cve5:argoproj:argo-workflows:>= 3.6.5, <= 3.6.19:>= 3.6.5, <= 3.6.19"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-5jv8-h7qh-rf5p","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-04-23T18:12:05.782000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:54.482027Z","label":"CVSS score revised","source":"cvelistv5"}]}