CVE-2026-42880
Full vulnerability record from the local CVENow database.
Description
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and 3.3.0 to before 3.3.9, there is a missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint that allows an attacker with read-only access to extract plaintext Kubernetes Secret data from etcd via the Kubernetes API server's Server-Side Apply dry-run mechanism. This issue has been patched in versions 3.2.11 and 3.3.9.
Severity
CRITICAL
CVSS score
9.6
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2026-05-07 23:16:32.450000
Last modified
2026-10-26 20:10:00.160000
View original CVE JSON
{
"id": "CVE-2026-42880",
"sourceIdentifier": "[email protected]",
"published": "2026-05-07T23:16:32.450",
"lastModified": "2026-10-26T20:10:00.160",
"vulnStatus": "Modified",
"cveTags": [],
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{
"lang": "en",
"value": "Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and 3.3.0 to before 3.3.9, there is a missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint that allows an attacker with read-only access to extract plaintext Kubernetes Secret data from etcd via the Kubernetes API server's Server-Side Apply dry-run mechanism. This issue has been patched in versions 3.2.11 and 3.3.9."
},
{
"lang": "es",
"value": "Argo CD es una herramienta de entrega continua declarativa, GitOps para Kubernetes. Desde las versiones 3.2.0 hasta antes de la 3.2.11 y de la 3.3.0 hasta antes de la 3.3.9, existe una brecha de autorización y enmascaramiento de datos faltante en el endpoint ServerSideDiff de Argo CD que permite a un atacante con acceso de solo lectura extraer datos de Secret de Kubernetes en texto plano de etcd a través del mecanismo de simulación (dry-run) de Aplicación del Lado del Servidor (Server-Side Apply) del servidor API de Kubernetes. Este problema ha sido parcheado en las versiones 3.2.11 y 3.3.9."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "argoproj",
"product": "argo-cd",
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],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
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"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "CHANGED",
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"integrityImpact": "HIGH",
"availabilityImpact": "NONE"
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"ssvcV203": [
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"id": "CVE-2026-42880",
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{
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{
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],
"role": "CISA Coordinator",
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-200"
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{
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"source": "[email protected]",
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}