Vulnerability-Lookup

CVE-2026-84716 (GCVE-0-2026-84716)

Vulnerability from cvelistv5 – Published: 2026-09-23 19:40 – Updated: 2026-10-16 11:55

Title

Automation-controller: automation-controller: instance install_bundle issues 10-year, non-revocable receptor mesh-ca certificates for caller-chosen (and case-variant impersonating) hostnames

Summary

A flaw was found in the automation-controller instance install-bundle endpoint. When a System Administrator downloads an execution/hop node's install bundle, the controller signs an X.509 certificate with the receptor mesh certificate authority in which the Common Name, DNS subject-alternative-name, and receptor node-id are taken verbatim from the caller-chosen instance hostname, with a hard-coded ten-year validity, a random serial, and no issuance log or revocation list. Because the hostname charset validator is case-insensitive while the uniqueness validator is case-sensitive, an administrator can register a case variant of an existing control node's hostname and obtain a mesh-CA-signed certificate that TLS peers, which match hostnames case-insensitively, accept as that control node. In managed/hosted deployments — where the customer holds controller superuser but the platform operator runs the mesh — this yields a long-lived, non-revocable mesh peer credential and, with an on-path position, TLS impersonation or interception of control/hybrid mesh nodes. It does not grant direct remote code execution, because receptor work submission is gated by a separate signing key not included in the bundle.

Severity

6.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-24 13:59 UTC

CWE

CWE-266 - Incorrect Privilege Assignment

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1036 records in the last 180 days details

References

6 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:71113	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:71114	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:71177	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:71179	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-84716	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2527199	issue-trackingx_refsource_REDHAT

Impacted products

5 products

Vendor	Product	Version
Red Hat	Red Hat Ansible Automation Platform 2.5 for RHEL 8	Unaffected: 0:4.6.33-1.el8ap , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.5::el8 cpe:/a:redhat:ansible_automation_platform:2.5::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9
Red Hat	Red Hat Ansible Automation Platform 2.5 for RHEL 9	Unaffected: 0:4.6.33-1.el9ap , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.5::el8 cpe:/a:redhat:ansible_automation_platform:2.5::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8 cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8 cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9
Red Hat	Red Hat Ansible Automation Platform 2.6 for RHEL 9	Unaffected: 0:4.7.17-1.el9ap , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.6::el10 cpe:/a:redhat:ansible_automation_platform:2.6::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9 cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9
Red Hat	Red Hat Ansible Automation Platform 2.6	Unaffected: 1789673739 , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.6::el9
Red Hat	Red Hat Ansible Automation Platform 2.7	Unaffected: 1789580684 , < * (rpm) cpe:/a:redhat:ansible_automation_platform:2.7::el9

Date Public

2026-09-23 00:00

Show details on NVD website

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FKIE_CVE-2026-84716

Vulnerability from fkie_nvd - Published: 2026-09-23 20:17 - Updated: 2026-09-24 16:17

Severity

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

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:71113
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:71114
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:71177
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:71179
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-84716
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2527199

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
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          "cpes": [
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          "product": "Red Hat Ansible Automation Platform 2.5 for RHEL 8",
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    }
  ],
  "id": "CVE-2026-84716",
  "lastModified": "2026-09-24T16:17:12.540",
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2527199"
    }
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  "vulnStatus": "Awaiting Analysis",
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          "value": "CWE-266"
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      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
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}

GHSA-HCPG-PRC4-W26W

Vulnerability from github – Published: 2026-09-23 21:30 – Updated: 2026-09-24 09:31

Details

Severity

6.6 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-84716"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-266"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-23T20:17:18Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in the automation-controller instance\n                  install-bundle endpoint. When a System Administrator downloads\n                  an execution/hop node\u0027s install bundle, the controller signs an\n                  X.509 certificate with the receptor mesh certificate authority\n                  in which the Common Name, DNS subject-alternative-name, and\n                  receptor node-id are taken verbatim from the caller-chosen\n                  instance hostname, with a hard-coded ten-year validity, a random\n                  serial, and no issuance log or revocation list. Because the\n                  hostname charset validator is case-insensitive while the\n                  uniqueness validator is case-sensitive, an administrator can\n                  register a case variant of an existing control node\u0027s hostname\n                  and obtain a mesh-CA-signed certificate that TLS peers, which\n                  match hostnames case-insensitively, accept as that control node.\n                  In managed/hosted deployments \u2014 where the customer holds\n                  controller superuser but the platform operator runs the mesh \u2014\n                  this yields a long-lived, non-revocable mesh peer credential and,\n                  with an on-path position, TLS impersonation or interception of\n                  control/hybrid mesh nodes. It does not grant direct remote code\n                  execution, because receptor work submission is gated by a\n                  separate signing key not included in the bundle.",
  "id": "GHSA-hcpg-prc4-w26w",
  "modified": "2026-09-24T09:31:50Z",
  "published": "2026-09-23T21:30:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84716"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:71113"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:71114"
    },
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      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:71177"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:71179"
    },
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    },
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    }
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      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
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}

RHSA-2026:71113

Vulnerability from csaf_redhat - Published: 2026-09-23 21:13 - Updated: 2026-10-17 17:14

Summary

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update

Severity

Critical

Scope

61 vulnerabilities in this advisory, including CVE-2026-84716.

CVE-2026-84716

6.6 (Medium)


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

Fixed: 4 products Known not affected: 103 products

https://access.redhat.com/errata/RHSA-2026:71113

Open the full advisory

RHSA-2026:71114

Vulnerability from csaf_redhat - Published: 2026-09-23 22:13 - Updated: 2026-10-17 17:14

Summary

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update

Severity

Critical

Scope

57 vulnerabilities in this advisory, including CVE-2026-84716.

CVE-2026-84716

6.6 (Medium)


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

Fixed: 8 products Known not affected: 130 products

https://access.redhat.com/errata/RHSA-2026:71114

Open the full advisory

RHSA-2026:71177

Vulnerability from csaf_redhat - Published: 2026-09-23 22:11 - Updated: 2026-10-16 11:59

Summary

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.7 Container Release Update

Severity

Critical

Scope

61 vulnerabilities in this advisory, including CVE-2026-84716.

CVE-2026-84716

6.6 (Medium)


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

Fixed: 2 products Known not affected: 60 products

https://access.redhat.com/errata/RHSA-2026:71177

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RHSA-2026:71179

Vulnerability from csaf_redhat - Published: 2026-09-23 22:20 - Updated: 2026-10-17 17:14

Summary

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update

Severity

Critical

Scope

89 vulnerabilities in this advisory, including CVE-2026-84716.

CVE-2026-84716

6.6 (Medium)


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

Fixed: 4 products Known not affected: 114 products

https://access.redhat.com/errata/RHSA-2026:71179

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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.

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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CVE-2026-84716 (GCVE-0-2026-84716)

FKIE_CVE-2026-84716

GHSA-HCPG-PRC4-W26W

RHSA-2026:71113

RHSA-2026:71114

RHSA-2026:71177

RHSA-2026:71179

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Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour