Vulnerability-Lookup

CVE-2026-44393 (GCVE-0-2026-44393)

Vulnerability from cvelistv5 – Published: 2026-06-04 00:00 – Updated: 2026-08-27 12:04

Summary

An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl_ca_file is configured, the driver enables certificate chain validation but does not pass the expected broker hostname into the underlying TLS stack. Any certificate signed by the deployment CA is accepted regardless of hostname, allowing an attacker who can intercept control-plane traffic to impersonate the RabbitMQ broker and perform a man-in-the-middle attack on RPC and notification traffic. All OpenStack services using oslo.messaging with RabbitMQ over TLS are affected.

Severity

7.4 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-04 17:24 UTC

CWE

n/a
CWE-297 - Improper Validation of Certificate with Host Mismatch
CWE-295 - Improper Certificate Validation

Assigner

mitre mitre root

References

6 references

URL	Tags
https://bugs.launchpad.net/oslo.messaging/+bug/2150316
https://wiki.openstack.org/wiki/OSSN/OSSN-0096
https://access.redhat.com/security/cve/CVE-2026-44393	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2484835	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:54757	vendor-advisoryx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat OpenStack Platform 16.2	Unaffected: 0:10.2.4-2.20260710155333.82281a0.el8ost , < * (rpm) cpe:/a:redhat:openstack:16.2::el8
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4
Red Hat	Red Hat OpenStack Platform 17.1	cpe:/a:redhat:openstack:17.1
Red Hat	Red Hat OpenStack Platform 18.0	cpe:/a:redhat:openstack:18.0

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                  "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                  "version": "3.1"
                },
                "format": "CVSS"
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-295",
                    "description": "Improper Certificate Validation",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-08-27T12:04:50.939Z",
              "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
              "shortName": "redhat-SADP"
            },
            "references": [
              {
                "tags": [
                  "vdb-entry",
                  "x_refsource_REDHAT"
                ],
                "url": "https://access.redhat.com/security/cve/CVE-2026-44393"
              },
              {
                "name": "RHBZ#2484835",
                "tags": [
                  "issue-tracking",
                  "x_refsource_REDHAT"
                ],
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484835"
              },
              {
                "tags": [
                  "x_sadp-csaf-vex"
                ],
                "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44393.json"
              },
              {
                "tags": [
                  "vendor-advisory",
                  "x_refsource_REDHAT"
                ],
                "url": "https://access.redhat.com/errata/RHSA-2026:54757"
              }
            ],
            "solutions": [
              {
                "lang": "en",
                "value": "RHSA-2026:54757: Red Hat OpenStack Platform 16.2"
              }
            ],
            "timeline": [
              {
                "lang": "en",
                "time": "2026-06-04T16:01:33.285Z",
                "value": "Reported to Red Hat."
              },
              {
                "lang": "en",
                "time": "2026-06-04T00:00:00.000Z",
                "value": "Made public."
              }
            ],
            "title": "oslo.messaging: openstack: OpenStack oslo.messaging: Man-in-the-middle attack via improper TLS hostname verification",
            "workarounds": [
              {
                "lang": "en",
                "value": "To mitigate the risk of man-in-the-middle attacks, restrict network access to the RabbitMQ message broker. Configure firewall rules to permit inbound connections to the RabbitMQ port (typically 5672 or 5671 for AMQPS) only from authorized hosts and services within the control plane. This operational measure reduces the exposure to attackers attempting to intercept and impersonate the broker."
              }
            ],
            "x_adpType": "supplier",
            "x_generator": {
              "engine": "sadp-cli 1.0.0"
            }
          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "HIGH",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "NONE",
                  "baseScore": 7.4,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "HIGH",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-44393",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-06-04T17:24:03.909681Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
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                    "cweId": "CWE-297",
                    "description": "CWE-297 Improper Validation of Certificate with Host Mismatch",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-06-04T17:22:49.214Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "n/a",
              "vendor": "n/a",
              "versions": [
                {
                  "status": "affected",
                  "version": "n/a"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl_ca_file is configured, the driver enables certificate chain validation but does not pass the expected broker hostname into the underlying TLS stack. Any certificate signed by the deployment CA is accepted regardless of hostname, allowing an attacker who can intercept control-plane traffic to impersonate the RabbitMQ broker and perform a man-in-the-middle attack on RPC and notification traffic. All OpenStack services using oslo.messaging with RabbitMQ over TLS are affected."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "n/a",
                  "lang": "en",
                  "type": "text"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-06-04T15:07:22.203Z",
            "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
            "shortName": "mitre"
          },
          "references": [
            {
              "url": "https://bugs.launchpad.net/oslo.messaging/+bug/2150316"
            },
            {
              "url": "https://wiki.openstack.org/wiki/OSSN/OSSN-0096"
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "assignerShortName": "mitre",
        "cveId": "CVE-2026-44393",
        "datePublished": "2026-06-04T00:00:00.000Z",
        "dateReserved": "2026-05-05T00:00:00.000Z",
        "dateUpdated": "2026-08-27T12:04:50.939Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-44393

Vulnerability from fkie_nvd - Published: 2026-06-04 16:16 - Updated: 2026-08-27 13:18

Severity

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

Summary

References

	URL	Tags
	cve@mitre.org	https://bugs.launchpad.net/oslo.messaging/+bug/2150316
	cve@mitre.org	https://wiki.openstack.org/wiki/OSSN/OSSN-0096
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:54757
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-44393
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2484835
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44393.json

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    },
    {
      "affectedData": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openstack:16.2::el8"
          ],
          "defaultStatus": "affected",
          "packageName": "python-oslo-messaging",
          "product": "Red Hat OpenStack Platform 16.2",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:10.2.4-2.20260710155333.82281a0.el8ost",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift:4"
          ],
          "defaultStatus": "unaffected",
          "packageName": "python-oslo-messaging",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openstack:17.1"
          ],
          "defaultStatus": "affected",
          "packageName": "python-oslo-messaging",
          "product": "Red Hat OpenStack Platform 17.1",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openstack:18.0"
          ],
          "defaultStatus": "affected",
          "packageName": "python-oslo-messaging",
          "product": "Red Hat OpenStack Platform 18.0",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl_ca_file is configured, the driver enables certificate chain validation but does not pass the expected broker hostname into the underlying TLS stack. Any certificate signed by the deployment CA is accepted regardless of hostname, allowing an attacker who can intercept control-plane traffic to impersonate the RabbitMQ broker and perform a man-in-the-middle attack on RPC and notification traffic. All OpenStack services using oslo.messaging with RabbitMQ over TLS are affected."
    },
    {
      "lang": "es",
      "value": "Se descubri\u00f3 un problema en OpenStack oslo.messaging desde la versi\u00f3n 1.0.0 hasta la 17.3.0. El controlador de RabbitMQ de oslo.messaging no realiza la verificaci\u00f3n del nombre de host TLS al conectarse al broker de mensajes. Cuando se configura ssl_ca_file, el controlador habilita la validaci\u00f3n de la cadena de certificados, pero no pasa el nombre de host esperado del broker a la pila TLS subyacente. Cualquier certificado firmado por la CA de despliegue es aceptado independientemente del nombre de host, permitiendo a un atacante que puede interceptar el tr\u00e1fico del plano de control suplantar al broker de RabbitMQ y realizar un ataque man-in-the-middle en el tr\u00e1fico RPC y de notificaciones. Todos los servicios de OpenStack que utilizan oslo.messaging con RabbitMQ sobre TLS se ven afectados."
    }
  ],
  "id": "CVE-2026-44393",
  "lastModified": "2026-08-27T13:18:04.500",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-44393",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-04T17:24:03.909681Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-04T16:16:38.497",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "https://bugs.launchpad.net/oslo.messaging/+bug/2150316"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://wiki.openstack.org/wiki/OSSN/OSSN-0096"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:54757"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/security/cve/CVE-2026-44393"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484835"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44393.json"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Awaiting Analysis",
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    {
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        {
          "lang": "en",
          "value": "CWE-297"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
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    {
      "description": [
        {
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          "value": "CWE-295"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}

GHSA-76QH-XR7Q-H39M

Vulnerability from github – Published: 2026-06-04 18:30 – Updated: 2026-07-15 22:30

Summary

OpenStack oslo.messaging does not verify RabbitMQ broker hostname during TLS handshake

Details

Severity

7.4 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "oslo.messaging"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0.0"
            },
            {
              "last_affected": "17.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44393"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295",
      "CWE-297"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-15T22:30:07Z",
    "nvd_published_at": "2026-06-04T16:16:38Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl_ca_file is configured, the driver enables certificate chain validation but does not pass the expected broker hostname into the underlying TLS stack. Any certificate signed by the deployment CA is accepted regardless of hostname, allowing an attacker who can intercept control-plane traffic to impersonate the RabbitMQ broker and perform a man-in-the-middle attack on RPC and notification traffic. All OpenStack services using oslo.messaging with RabbitMQ over TLS are affected.",
  "id": "GHSA-76qh-xr7q-h39m",
  "modified": "2026-07-15T22:30:07Z",
  "published": "2026-06-04T18:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44393"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-44393"
    },
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/oslo.messaging/+bug/2150316"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484835"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openstack/oslo.messaging"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44393.json"
    },
    {
      "type": "WEB",
      "url": "https://wiki.openstack.org/wiki/OSSN/OSSN-0096"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenStack oslo.messaging does not verify RabbitMQ broker hostname during TLS handshake"
}

OPENSUSE-SU-2026:10973-1

Vulnerability from csaf_opensuse - Published: 2026-06-08 00:00 - Updated: 2026-09-17 17:08

Summary

python3-oslo.messaging-doc-18.1.0-1.1 on GA media

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2026-44393.

CVE-2026-44393

Recommended: 16 products

Open the full advisory

PYSEC-2026-3492

Vulnerability from pysec - Published: 2026-07-23 11:41 - Updated: 2026-07-28 09:13

Details

Severity

7.4 (High)


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

Impacted products

Name	purl
oslo-messaging	pkg:pypi/oslo-messaging

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "oslo-messaging",
        "purl": "pkg:pypi/oslo-messaging"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0.0"
            },
            {
              "last_affected": "17.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.0",
        "1.11.0",
        "1.12.0",
        "1.12.1",
        "1.13.0",
        "1.14.0",
        "1.15.0",
        "1.16.0",
        "1.17.0",
        "1.17.1",
        "1.3.0",
        "1.3.0a4",
        "1.3.0a5",
        "1.3.0a6",
        "1.3.0a7",
        "1.3.0a8",
        "1.3.0a9",
        "1.3.1",
        "1.4.0",
        "1.4.0.0a1",
        "1.4.0.0a2",
        "1.4.0.0a3",
        "1.4.0.0a4",
        "1.4.0.0a5",
        "1.4.1",
        "1.4.2",
        "1.5.0",
        "1.5.1",
        "1.6.0",
        "1.7.0",
        "1.8.0",
        "1.8.1",
        "1.8.2",
        "1.8.3",
        "1.9.0",
        "10.0.0",
        "10.1.0",
        "10.2.0",
        "10.2.1",
        "10.2.2",
        "10.2.3",
        "10.2.4",
        "10.3.0",
        "10.4.0",
        "10.4.1",
        "10.5.0",
        "11.0.0",
        "12.0.0",
        "12.1.0",
        "12.1.1",
        "12.1.2",
        "12.1.3",
        "12.1.4",
        "12.1.5",
        "12.1.6",
        "12.10.0",
        "12.11.0",
        "12.11.1",
        "12.12.0",
        "12.13.0",
        "12.13.1",
        "12.13.2",
        "12.13.3",
        "12.14.0",
        "12.2.0",
        "12.2.1",
        "12.2.2",
        "12.3.0",
        "12.4.0",
        "12.5.0",
        "12.5.1",
        "12.5.2",
        "12.6.0",
        "12.6.1",
        "12.7.0",
        "12.7.1",
        "12.7.2",
        "12.7.3",
        "12.8.0",
        "12.9.0",
        "12.9.1",
        "12.9.2",
        "12.9.3",
        "12.9.4",
        "13.0.0",
        "14.0.0",
        "14.0.1",
        "14.0.2",
        "14.0.3",
        "14.1.0",
        "14.2.0",
        "14.2.1",
        "14.2.2",
        "14.2.3",
        "14.2.4",
        "14.2.5",
        "14.3.0",
        "14.3.1",
        "14.4.0",
        "14.4.1",
        "14.4.2",
        "14.5.0",
        "14.6.0",
        "14.7.0",
        "14.7.1",
        "14.7.2",
        "14.7.3",
        "14.8.0",
        "14.8.1",
        "14.9.0",
        "14.9.1",
        "14.9.2",
        "14.9.3",
        "15.0.0",
        "16.0.0",
        "16.1.0",
        "16.1.1",
        "17.0.0",
        "17.1.0",
        "17.2.0",
        "17.3.0",
        "2.0.0",
        "2.1.0",
        "2.2.0",
        "2.3.0",
        "2.4.0",
        "2.5.0",
        "2.6.0",
        "2.6.1",
        "2.7.0",
        "2.8.0",
        "2.8.1",
        "2.9.0",
        "3.0.0",
        "3.1.0",
        "4.0.0",
        "4.1.0",
        "4.2.0",
        "4.3.0",
        "4.4.0",
        "4.5.0",
        "4.5.1",
        "4.6.0",
        "4.6.1",
        "5.0.0",
        "5.1.0",
        "5.10.0",
        "5.10.1",
        "5.10.2",
        "5.11.0",
        "5.12.0",
        "5.13.0",
        "5.14.0",
        "5.15.0",
        "5.16.0",
        "5.17.0",
        "5.17.1",
        "5.17.2",
        "5.17.3",
        "5.17.4",
        "5.18.0",
        "5.19.0",
        "5.2.0",
        "5.20.0",
        "5.21.0",
        "5.22.0",
        "5.23.0",
        "5.24.0",
        "5.24.1",
        "5.24.2",
        "5.25.0",
        "5.26.0",
        "5.27.0",
        "5.28.0",
        "5.29.0",
        "5.3.0",
        "5.30.0",
        "5.30.1",
        "5.30.2",
        "5.30.3",
        "5.30.4",
        "5.30.5",
        "5.30.6",
        "5.30.7",
        "5.30.8",
        "5.31.0",
        "5.32.0",
        "5.33.0",
        "5.33.1",
        "5.34.0",
        "5.34.1",
        "5.35.0",
        "5.35.1",
        "5.35.2",
        "5.35.3",
        "5.35.4",
        "5.35.5",
        "5.35.6",
        "5.36.0",
        "5.4.0",
        "5.5.0",
        "5.6.0",
        "5.7.0",
        "5.8.0",
        "5.9.0",
        "6.0.0",
        "6.1.0",
        "6.2.0",
        "6.3.0",
        "6.4.0",
        "6.4.1",
        "6.5.0",
        "7.0.0",
        "8.0.0",
        "8.1.0",
        "8.1.1",
        "8.1.2",
        "8.1.3",
        "8.1.4",
        "9.0.0",
        "9.0.1",
        "9.1.0",
        "9.1.1",
        "9.2.0",
        "9.2.1",
        "9.3.0",
        "9.3.1",
        "9.4.0",
        "9.5.0",
        "9.5.1",
        "9.5.2",
        "9.6.0",
        "9.7.0",
        "9.7.1",
        "9.7.2",
        "9.8.0",
        "16.1.2"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44393",
    "GHSA-76qh-xr7q-h39m"
  ],
  "details": "An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl_ca_file is configured, the driver enables certificate chain validation but does not pass the expected broker hostname into the underlying TLS stack. Any certificate signed by the deployment CA is accepted regardless of hostname, allowing an attacker who can intercept control-plane traffic to impersonate the RabbitMQ broker and perform a man-in-the-middle attack on RPC and notification traffic. All OpenStack services using oslo.messaging with RabbitMQ over TLS are affected.",
  "id": "PYSEC-2026-3492",
  "modified": "2026-07-28T09:13:08.717042Z",
  "published": "2026-07-23T11:41:38.572568Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44393"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-44393"
    },
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/oslo.messaging/+bug/2150316"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484835"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openstack/oslo.messaging"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44393.json"
    },
    {
      "type": "WEB",
      "url": "https://wiki.openstack.org/wiki/OSSN/OSSN-0096"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/oslo-messaging"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-76qh-xr7q-h39m"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenStack oslo.messaging does not verify RabbitMQ broker hostname during TLS handshake"
}

RHSA-2026:54757

Vulnerability from csaf_redhat - Published: 2026-08-13 23:45 - Updated: 2026-09-28 14:13

Summary

Red Hat Security Advisory: Red Hat OpenStack Platform 16.2 security advisory

Severity

Important

Scope

24 vulnerabilities in this advisory, including CVE-2026-44393.

CVE-2026-44393

A flaw was found in OpenStack oslo.messaging. The RabbitMQ driver does not properly verify the hostname of the message broker when establishing a TLS (Transport Layer Security) connection. An attacker capable of intercepting control-plane network traffic can exploit this vulnerability to impersonate the RabbitMQ broker. This allows the attacker to perform a man-in-the-middle attack, potentially leading to the disclosure or manipulation of sensitive RPC (Remote Procedure Call) and notification traffic.

7.4 (High)


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

Fixed: 6 products Known not affected: 213 products

https://access.redhat.com/errata/RHSA-2026:54757

Open the full advisory

UBUNTU-CVE-2026-44393 (CVE-2026-44393)

Vulnerability from osv_ubuntu – Published: 2026-06-04 16:16 – Updated: 2026-06-30 16:21 – Source website

Details

Severity

7.4 (High)


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

7.4 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-44393	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-44393	REPORT
	https://wiki.openstack.org/wiki/OSSN/OSSN-0096	REPORT
	https://launchpad.net/bugs/2150316	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "oslo-messaging-zmq-receiver",
            "binary_version": "4.6.1-2ubuntu2"
          },
          {
            "binary_name": "python-oslo-messaging",
            "binary_version": "4.6.1-2ubuntu2"
          },
          {
            "binary_name": "python-oslo.messaging",
            "binary_version": "4.6.1-2ubuntu2"
          },
          {
            "binary_name": "python3-oslo.messaging",
            "binary_version": "4.6.1-2ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "python-oslo.messaging",
        "purl": "pkg:deb/ubuntu/python-oslo.messaging@4.6.1-2ubuntu2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.5.0-1ubuntu1",
        "3.0.0-1ubuntu2",
        "4.5.0-1ubuntu1",
        "4.5.1-1ubuntu1",
        "4.6.1-2ubuntu1",
        "4.6.1-2ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "oslo-messaging-zmq-receiver",
            "binary_version": "5.35.0-0ubuntu4"
          },
          {
            "binary_name": "python-oslo.messaging",
            "binary_version": "5.35.0-0ubuntu4"
          },
          {
            "binary_name": "python3-oslo.messaging",
            "binary_version": "5.35.0-0ubuntu4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "python-oslo.messaging",
        "purl": "pkg:deb/ubuntu/python-oslo.messaging@5.35.0-0ubuntu4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.30.0-0ubuntu1",
        "5.33.1-0ubuntu1",
        "5.34.1-0ubuntu1",
        "5.35.0-0ubuntu1",
        "5.35.0-0ubuntu2",
        "5.35.0-0ubuntu3",
        "5.35.0-0ubuntu4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-oslo.messaging",
            "binary_version": "12.1.6-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "python-oslo.messaging",
        "purl": "pkg:deb/ubuntu/python-oslo.messaging@12.1.6-0ubuntu1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.7.1-0ubuntu3",
        "10.4.0-0ubuntu2",
        "10.5.0-0ubuntu1",
        "11.0.0-0ubuntu1",
        "12.1.0-0ubuntu1",
        "12.1.6-0ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-oslo.messaging",
            "binary_version": "12.13.0-0ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "python-oslo.messaging",
        "purl": "pkg:deb/ubuntu/python-oslo.messaging@12.13.0-0ubuntu1.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "12.9.1-0ubuntu4",
        "12.11.0-0ubuntu1",
        "12.11.1-0ubuntu1",
        "12.13.0-0ubuntu1",
        "12.13.0-0ubuntu1.1",
        "12.13.0-0ubuntu1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-oslo.messaging",
            "binary_version": "14.6.0-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "python-oslo.messaging",
        "purl": "pkg:deb/ubuntu/python-oslo.messaging@14.6.0-0ubuntu1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "14.4.1-0ubuntu1",
        "14.6.0-0ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-oslo.messaging",
            "binary_version": "17.1.0-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "python-oslo.messaging",
        "purl": "pkg:deb/ubuntu/python-oslo.messaging@17.1.0-0ubuntu1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "16.1.0-0ubuntu1",
        "17.1.0-0ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-oslo.messaging",
            "binary_version": "17.3.0-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "python-oslo.messaging",
        "purl": "pkg:deb/ubuntu/python-oslo.messaging@17.3.0-2ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "17.1.0-0ubuntu1",
        "17.2.0-0ubuntu1",
        "17.3.0-2ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl_ca_file is configured, the driver enables certificate chain validation but does not pass the expected broker hostname into the underlying TLS stack. Any certificate signed by the deployment CA is accepted regardless of hostname, allowing an attacker who can intercept control-plane traffic to impersonate the RabbitMQ broker and perform a man-in-the-middle attack on RPC and notification traffic. All OpenStack services using oslo.messaging with RabbitMQ over TLS are affected.",
  "id": "UBUNTU-CVE-2026-44393",
  "modified": "2026-06-30T16:21:56Z",
  "published": "2026-06-04T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44393"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-44393"
    },
    {
      "type": "REPORT",
      "url": "https://wiki.openstack.org/wiki/OSSN/OSSN-0096"
    },
    {
      "type": "REPORT",
      "url": "https://launchpad.net/bugs/2150316"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-44393"
  ]
}

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.

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.

Action not permitted

CVE-2026-44393 (GCVE-0-2026-44393)

FKIE_CVE-2026-44393

GHSA-76QH-XR7Q-H39M

OPENSUSE-SU-2026:10973-1

PYSEC-2026-3492

RHSA-2026:54757

UBUNTU-CVE-2026-44393 (CVE-2026-44393)

Tags

Sightings

Nomenclature

Related by attack behaviour