CVE-2026-40886

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Source
https://cve.org/CVERecord?id=CVE-2026-40886
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40886.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40886
Aliases
Downstream
Related
Published
2026-04-23T18:12:05.782Z
Modified
2026-07-16T03:31:02.521013773Z
Severity
  • 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVSS Calculator
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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40886.json",
    "cwe_ids": [
        "CWE-129"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/argoproj/argo-workflows

Affected ranges

Type
GIT
Repo
https://github.com/argoproj/argo-workflows
Events
Introduced
9e532061c064d1205610b1932a0fb3c4dc053421
Last affected
c66a734c911a25a1e0f626af5995a222d6267e37
Introduced
d1d689b367c4c8a5a8a095ae60b5d7043f99eda9
Fixed
ca37b537cd34d18029146a755bf42a9b2364c49b
Introduced
a8bff4a72130bc1a13d95c6f73ff3fafec880287
Fixed
0ab1452144d8f4d57c50b37ce50dad218868e950
Database specific 
{
    "cpe": "cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "3.6.5"
        },
        {
            "last_affected": "3.6.19"
        },
        {
            "introduced": "3.7.0"
        },
        {
            "fixed": "3.7.14"
        },
        {
            "introduced": "4.0.0"
        },
        {
            "fixed": "4.0.5"
        }
    ]
}

Affected versions

v3.*
v3.6.10
v3.6.11
v3.6.12
v3.6.13
v3.6.14
v3.6.15
v3.6.16
v3.6.17
v3.6.18
v3.6.19
v3.6.5
v3.6.6
v3.6.7
v3.6.8
v3.6.9
v3.7.0
v3.7.0-rc4
v3.7.1
v3.7.10
v3.7.11
v3.7.12
v3.7.13
v3.7.2
v3.7.3
v3.7.4
v3.7.5
v3.7.6
v3.7.7
v3.7.8
v3.7.9
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.0.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40886.json"