{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55761",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-17T14:34:51.880Z",
        "datePublished": "2026-07-08T15:03:54.158Z",
        "dateUpdated": "2026-07-08T15:52:30.257Z"
    },
    "containers": {
        "cna": {
            "title": "Portainer: Unauthenticated Restore Endpoint Allows Admin Takeover on Uninitialised Portainer Instances",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "lang": "en",
                            "description": "CWE-287: Improper Authentication",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "HIGH",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/portainer/portainer/security/advisories/GHSA-x626-fcwx-f5pc",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/portainer/portainer/security/advisories/GHSA-x626-fcwx-f5pc"
                },
                {
                    "name": "https://github.com/portainer/portainer/issues/2770",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/portainer/portainer/issues/2770"
                },
                {
                    "name": "https://github.com/portainer/portainer/commit/49f19107cf9a3540cbe406c9eb7f24390e1af02b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/portainer/portainer/commit/49f19107cf9a3540cbe406c9eb7f24390e1af02b"
                },
                {
                    "name": "https://github.com/portainer/portainer/commit/d2b56efcb4e43c4168bb6688eee9f6bf22867312",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/portainer/portainer/commit/d2b56efcb4e43c4168bb6688eee9f6bf22867312"
                },
                {
                    "name": "https://github.com/portainer/portainer/releases/tag/2.39.4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/portainer/portainer/releases/tag/2.39.4"
                },
                {
                    "name": "https://github.com/portainer/portainer/releases/tag/2.43.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/portainer/portainer/releases/tag/2.43.0"
                }
            ],
            "affected": [
                {
                    "vendor": "portainer",
                    "product": "portainer",
                    "versions": [
                        {
                            "version": ">= 2.39.0, < 2.39.4",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-08T15:03:54.158Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. In versions 2.39.0 through 2.39.3 and 2.40.0 until 2.43.0, unauthenticated restore and administrator initialization endpoints (/api/restore and /api/users/admin/init) remain accessible during the five-minute setup window for uninitialized instances, allowing a network attacker to restore a crafted backup or create the first administrator account and gain full administrative access. This issue is fixed in versions 2.39.4 and 2.43.0."
                }
            ],
            "source": {
                "advisory": "GHSA-x626-fcwx-f5pc",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-08T15:51:27.827566Z",
                                "id": "CVE-2026-55761",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-08T15:52:30.257Z"
                }
            }
        ]
    }
}