CVE-2026-66786
Full vulnerability record from the local CVENow database.
Description
A flaw was found in submariner. In cert-auth mode, the connection configuration is built using free-form strings from the Custom Resource Definition (CRD) without proper validation. A malicious cluster can exploit this by publishing a CableName that includes newlines and ipsec.conf directives. This allows an attacker to inject arbitrary configuration parameters or execute commands through leftupdown hooks, leading to remote code execution as root on the gateway node.
Severity
CRITICAL
CVSS score
9.1
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-09-02 18:21:10.517000
Last modified
2026-10-19 18:17:08.327000
View original CVE JSON
{
"id": "CVE-2026-66786",
"sourceIdentifier": "[email protected]",
"published": "2026-09-02T18:21:10.517",
"lastModified": "2026-10-19T18:17:08.327",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in submariner. In cert-auth mode, the connection configuration is built using free-form strings from the Custom Resource Definition (CRD) without proper validation. A malicious cluster can exploit this by publishing a CableName that includes newlines and ipsec.conf directives. This allows an attacker to inject arbitrary configuration parameters or execute commands through leftupdown hooks, leading to remote code execution as root on the gateway node."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
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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:H/UI:N/S:C/C:H/I:H/A:H",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "HIGH",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
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"availabilityImpact": "HIGH"
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"ssvcData": {
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"id": "CVE-2026-66786",
"options": [
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},
{
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{
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}
],
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"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-94"
}
]
}
],
"references": [
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"url": "https://access.redhat.com/errata/RHSA-2026:63016",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85227",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-66786",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507531",
"source": "[email protected]"
}
]
}