Vulnerability-Lookup

CVE-2026-66878 (GCVE-0-2026-66878)

Vulnerability from cvelistv5 – Published: 2026-08-12 01:10 – Updated: 2026-08-13 15:15

Title

Multicloud-operators-subscription: multicloud-operators-subscription: fetchchannelreferences honours channel.spec.secretref.namespace enabling cross-namespace secret exfiltration

Summary

A flaw was found in multicloud-operators-subscription. A privileged user, specifically a namespace administrator capable of creating Channel and Subscription resources, can exploit this vulnerability. By manipulating the Channel.Spec.SecretRef.Namespace field, the user can cause the system to copy sensitive Secret contents from other namespaces into their own, leading to information disclosure.

Severity

7.7 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 15:14 UTC

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-66878	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2514226	issue-trackingx_refsource_REDHAT

Impacted products

1 product

Vendor	Product	Version	CPE status
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2	cpe:/a:redhat:acm:2

Date Public

2026-08-11 00:00

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-66878

Vulnerability from fkie_nvd - Published: 2026-08-12 02:16 - Updated: 2026-08-14 19:07

Severity

7.7 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-66878
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2514226

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:acm:2"
          ],
          "defaultStatus": "affected",
          "packageName": "rhacm2/multicluster-operators-subscription-rhel9",
          "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
          "vendor": "Red Hat"
        }
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      "source": "secalert@redhat.com"
    }
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    }
  ],
  "id": "CVE-2026-66878",
  "lastModified": "2026-08-14T19:07:46.080",
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GHSA-37C6-V768-8X6W

Vulnerability from github – Published: 2026-08-12 03:31 – Updated: 2026-08-12 03:31

Details

Severity

7.7 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-66878"
  ],
  "database_specific": {
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      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
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  "id": "GHSA-37c6-v768-8x6w",
  "modified": "2026-08-12T03:31:17Z",
  "published": "2026-08-12T03:31:17Z",
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    {
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66878"
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      "type": "CVSS_V3"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-66878 (GCVE-0-2026-66878)

FKIE_CVE-2026-66878

GHSA-37C6-V768-8X6W

Tags

Sightings

Nomenclature