{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-106492",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-06T18:46:47.766Z",
        "datePublished": "2026-10-06T20:48:05.896Z",
        "dateUpdated": "2026-10-06T20:48:05.896Z"
    },
    "containers": {
        "cna": {
            "title": "Backstage: Improper preservation of access restrictions during service credential delegation",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-269",
                            "lang": "en",
                            "description": "CWE-269: Improper Privilege Management",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-863",
                            "lang": "en",
                            "description": "CWE-863: Incorrect Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 7.6,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7v",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7v"
                },
                {
                    "name": "https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124"
                },
                {
                    "name": "https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33"
                },
                {
                    "name": "https://github.com/backstage/backstage/releases/tag/v1.49.6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/backstage/backstage/releases/tag/v1.49.6"
                },
                {
                    "name": "https://github.com/backstage/backstage/releases/tag/v1.54.6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/backstage/backstage/releases/tag/v1.54.6"
                }
            ],
            "affected": [
                {
                    "vendor": "backstage",
                    "product": "backstage",
                    "versions": [
                        {
                            "version": "< 1.49.6",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.50.0-next.0, < 1.54.6",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "@backstage",
                    "product": "backend-defaults",
                    "versions": [
                        {
                            "version": "< 0.16.1",
                            "status": "affected"
                        },
                        {
                            "version": ">= 0.17.0, < 0.17.8",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-06T20:48:05.896Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8."
                }
            ],
            "source": {
                "advisory": "GHSA-cq7v-rfgc-5c7v",
                "discovery": "UNKNOWN"
            }
        }
    }
}