CVE-2026-45726 (GCVE-0-2026-45726)
Vulnerability from cvelistv5 – Published: 2026-09-17 19:37 – Updated: 2026-09-17 19:37
VLAI
EPSS
VEX
Title
Omni: Reader-level users can retrieve imported cluster CA keys via ResourceService
Summary
Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. From 1.3.0 until 1.6.6 and 1.7.3, importing a standalone Talos cluster creates an ImportedClusterSecrets resource containing the cluster's complete CA secrets bundle. The access rules in internal/backend/runtime/omni/state_access.go allow an authenticated user with the Reader role to retrieve the resource through ResourceService if the importing actor has not rotated those secrets, exposing Kubernetes, Talos, and etcd CA private keys plus the service-account key. The Kubernetes CA private key permits certificate signing for privileged identities such as system:masters and provides control of the imported cluster outside Omni's authorization boundary, including its workloads, credentials, and secrets. This issue is fixed in versions 1.6.6 and 1.7.3.
Severity
7.6 (High)
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/siderolabs/omni/security/advis… | x_refsource_CONFIRM |
| https://github.com/siderolabs/omni/pull/2807 | x_refsource_MISC |
| https://github.com/siderolabs/omni/commit/25fa9e1… | x_refsource_MISC |
| https://github.com/siderolabs/omni/commit/a224cb0… | x_refsource_MISC |
| https://github.com/siderolabs/omni/commit/b8ca100… | x_refsource_MISC |
| https://github.com/siderolabs/omni/releases/tag/v1.6.6 | x_refsource_MISC |
| https://github.com/siderolabs/omni/releases/tag/v1.7.3 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| siderolabs | omni |
Affected:
>= 1.3.0, < 1.6.6
|
guessed |
{
"containers": {
"cna": {
"affected": [
{
"product": "omni",
"vendor": "siderolabs",
"versions": [
{
"status": "affected",
"version": "\u003e= 1.3.0, \u003c 1.6.6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. From 1.3.0 until 1.6.6 and 1.7.3, importing a standalone Talos cluster creates an ImportedClusterSecrets resource containing the cluster\u0027s complete CA secrets bundle. The access rules in internal/backend/runtime/omni/state_access.go allow an authenticated user with the Reader role to retrieve the resource through ResourceService if the importing actor has not rotated those secrets, exposing Kubernetes, Talos, and etcd CA private keys plus the service-account key. The Kubernetes CA private key permits certificate signing for privileged identities such as system:masters and provides control of the imported cluster outside Omni\u0027s authorization boundary, including its workloads, credentials, and secrets. This issue is fixed in versions 1.6.6 and 1.7.3."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-200",
"description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-522",
"description": "CWE-522: Insufficiently Protected Credentials",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-732",
"description": "CWE-732: Incorrect Permission Assignment for Critical Resource",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-17T19:37:50.625Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/siderolabs/omni/security/advisories/GHSA-wv8c-6mx2-xf4j",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/siderolabs/omni/security/advisories/GHSA-wv8c-6mx2-xf4j"
},
{
"name": "https://github.com/siderolabs/omni/pull/2807",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/siderolabs/omni/pull/2807"
},
{
"name": "https://github.com/siderolabs/omni/commit/25fa9e141ee00285e70210ed40d11e4e457c871d",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/siderolabs/omni/commit/25fa9e141ee00285e70210ed40d11e4e457c871d"
},
{
"name": "https://github.com/siderolabs/omni/commit/a224cb020f3aaca2bc21c3e32a38eb4a37e531e8",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/siderolabs/omni/commit/a224cb020f3aaca2bc21c3e32a38eb4a37e531e8"
},
{
"name": "https://github.com/siderolabs/omni/commit/b8ca100c4539ea83f0ac2e53dcd523e6e5b68111",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/siderolabs/omni/commit/b8ca100c4539ea83f0ac2e53dcd523e6e5b68111"
},
{
"name": "https://github.com/siderolabs/omni/releases/tag/v1.6.6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/siderolabs/omni/releases/tag/v1.6.6"
},
{
"name": "https://github.com/siderolabs/omni/releases/tag/v1.7.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/siderolabs/omni/releases/tag/v1.7.3"
}
],
"source": {
"advisory": "GHSA-wv8c-6mx2-xf4j",
"discovery": "UNKNOWN"
},
"title": "Omni: Reader-level users can retrieve imported cluster CA keys via ResourceService"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-45726",
"datePublished": "2026-09-17T19:37:50.625Z",
"dateReserved": "2026-05-13T05:51:48.667Z",
"dateUpdated": "2026-09-17T19:37:50.625Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-45726",
"date": "2026-09-20",
"epss": "0.00099",
"percentile": "0.00925"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "omni",
"vendor": "siderolabs",
"versions": [
{
"status": "affected",
"version": "\u003e= 1.3.0, \u003c 1.6.6"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. From 1.3.0 until 1.6.6 and 1.7.3, importing a standalone Talos cluster creates an ImportedClusterSecrets resource containing the cluster\u0027s complete CA secrets bundle. The access rules in internal/backend/runtime/omni/state_access.go allow an authenticated user with the Reader role to retrieve the resource through ResourceService if the importing actor has not rotated those secrets, exposing Kubernetes, Talos, and etcd CA private keys plus the service-account key. The Kubernetes CA private key permits certificate signing for privileged identities such as system:masters and provides control of the imported cluster outside Omni\u0027s authorization boundary, including its workloads, credentials, and secrets. This issue is fixed in versions 1.6.6 and 1.7.3."
}
],
"id": "CVE-2026-45726",
"lastModified": "2026-09-17T20:16:49.650",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 0.9,
"impactScore": 6.0,
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
},
"published": "2026-09-17T20:16:49.650",
"references": [
{
"source": "security-advisories@github.com",
"url": "https://github.com/siderolabs/omni/commit/25fa9e141ee00285e70210ed40d11e4e457c871d"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/siderolabs/omni/commit/a224cb020f3aaca2bc21c3e32a38eb4a37e531e8"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/siderolabs/omni/commit/b8ca100c4539ea83f0ac2e53dcd523e6e5b68111"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/siderolabs/omni/pull/2807"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/siderolabs/omni/releases/tag/v1.6.6"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/siderolabs/omni/releases/tag/v1.7.3"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/siderolabs/omni/security/advisories/GHSA-wv8c-6mx2-xf4j"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Received",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-200"
},
{
"lang": "en",
"value": "CWE-522"
},
{
"lang": "en",
"value": "CWE-732"
}
],
"source": "security-advisories@github.com",
"type": "Primary"
}
]
}
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-19T01:56:05Z",
"cve": "CVE-2026-45726",
"id": "CVE-2026-45726",
"initial_release_date": "2026-07-30T16:47:01Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-45726",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45726.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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