CVE-2026-18874
Full vulnerability record from the local CVENow database.
Description
A flaw was found in volsync-addon-controller. This vulnerability allows an attacker to inject malicious YAML (Yet Another Markup Language) code into the OpenShift Lifecycle Manager (OLM) Subscription resource. This is due to improper escaping of annotation values when they are rendered into YAML. Successful exploitation could lead to unauthorized modification or control over OLM Subscription configurations, potentially impacting software management within the cluster. This issue primarily affects systems where the 'volsync-addon-deploy-type: olm' annotation is explicitly enabled.
Severity
MEDIUM
CVSS score
6.2
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-19 18:16:36.080000
Last modified
2026-10-26 11:10:00.157000
View original CVE JSON
{
"id": "CVE-2026-18874",
"sourceIdentifier": "[email protected]",
"published": "2026-08-19T18:16:36.080",
"lastModified": "2026-10-26T11:10:00.157",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in volsync-addon-controller. This vulnerability allows an attacker to inject malicious YAML (Yet Another Markup Language) code into the OpenShift Lifecycle Manager (OLM) Subscription resource. This is due to improper escaping of annotation values when they are rendered into YAML. Successful exploitation could lead to unauthorized modification or control over OLM Subscription configurations, potentially impacting software management within the cluster. This issue primarily affects systems where the 'volsync-addon-deploy-type: olm' annotation is explicitly enabled."
},
{
"lang": "es",
"value": "Se encontró un fallo en volsync-addon-controller. Esta vulnerabilidad permite a un atacante inyectar código YAML (Yet Another Markup Language) malicioso en el recurso de Suscripción de OpenShift Lifecycle Manager (OLM). Esto se debe a un escape incorrecto de los valores de las anotaciones cuando se renderizan en YAML. Una explotación exitosa podría llevar a la modificación o el control no autorizados sobre las configuraciones de Suscripción de OLM, lo que podría afectar la gestión de software dentro del clúster. Este problema afecta principalmente a los sistemas donde la anotación ’volsync-addon-deploy-type: olm’ está explícitamente habilitada."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.11",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/acm-volsync-addon-controller-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.11::el9"
],
"versions": [
{
"version": "1787683560",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.13",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/acm-volsync-addon-controller-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.13::el9"
],
"versions": [
{
"version": "1787266564",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.14",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/acm-volsync-addon-controller-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.14::el9"
],
"versions": [
{
"version": "1787266564",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.15",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/acm-volsync-addon-controller-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.15::el9"
],
"versions": [
{
"version": "1787266360",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.16",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/acm-volsync-addon-controller-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.16::el9"
],
"versions": [
{
"version": "1787266564",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/acm-volsync-addon-controller-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.17::el9"
],
"versions": [
{
"version": "1787266556",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H",
"baseScore": 6.2,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "HIGH",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 0.7,
"impactScore": 5.5
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-19T19:54:04.444241Z",
"id": "CVE-2026-18874",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-94"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:60386",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60387",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60388",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60389",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60390",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60391",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-18874",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511115",
"source": "[email protected]"
}
]
}