{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55547",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-16T23:01:04.075Z",
        "datePublished": "2026-08-28T17:11:34.332Z",
        "dateUpdated": "2026-08-28T20:30:11.670Z"
    },
    "containers": {
        "cna": {
            "title": "Yamcs: Missing Authorization on Role and Privilege Enumeration Endpoints Allows Any Authenticated User to Disclose Full Security Configuration",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-285",
                            "lang": "en",
                            "description": "CWE-285: Improper Authorization",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-862",
                            "lang": "en",
                            "description": "CWE-862: Missing Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 4.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq"
                },
                {
                    "name": "https://github.com/yamcs/yamcs/commit/c2aec1c242e656e48b52c7f87deea88183bb592d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/yamcs/yamcs/commit/c2aec1c242e656e48b52c7f87deea88183bb592d"
                },
                {
                    "name": "https://github.com/yamcs/yamcs/commit/dcaec5f0b2f4231b8e313e94d79a937169c9e0ba",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/yamcs/yamcs/commit/dcaec5f0b2f4231b8e313e94d79a937169c9e0ba"
                },
                {
                    "name": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8"
                },
                {
                    "name": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2"
                }
            ],
            "affected": [
                {
                    "vendor": "yamcs",
                    "product": "yamcs",
                    "versions": [
                        {
                            "version": "< 5.12.8",
                            "status": "affected"
                        },
                        {
                            "version": ">= 5.13.0, < 5.13.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-28T17:11:34.332Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs omits SystemPrivilege.ControlAccess checks from IamApi.listRoles, IamApi.getRole, and IamApi.listPrivileges in yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java. Any authenticated account can call GET /api/roles, GET /api/roles/{name}, and GET /api/privileges to enumerate available system privileges and configured role mappings. The disclosure reveals security configuration that can support targeted privilege-escalation attempts. This issue is fixed in versions 5.12.8 and 5.13.2."
                }
            ],
            "source": {
                "advisory": "GHSA-cvw4-55pp-3hfq",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-cvw4-55pp-3hfq",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-28T20:29:51.716854Z",
                                "id": "CVE-2026-55547",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "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": "2026-08-28T20:30:11.670Z"
                }
            }
        ]
    }
}