{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-104955",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-02T18:16:13.628Z",
        "datePublished": "2026-10-05T16:42:25.771Z",
        "dateUpdated": "2026-10-07T20:52:04.227Z"
    },
    "containers": {
        "cna": {
            "title": "Plane: Project Member can escalate Project Guest to Member via PATCH /project-members/{pk} (BAC / Privilege Escalation)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-269",
                            "lang": "en",
                            "description": "CWE-269: Improper Privilege Management",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-285",
                            "lang": "en",
                            "description": "CWE-285: Improper Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.4,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4"
                },
                {
                    "name": "https://github.com/makeplane/plane/pull/9014",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/makeplane/plane/pull/9014"
                },
                {
                    "name": "https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e"
                },
                {
                    "name": "https://github.com/makeplane/plane/releases/tag/v1.4.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/makeplane/plane/releases/tag/v1.4.0"
                }
            ],
            "affected": [
                {
                    "vendor": "makeplane",
                    "product": "plane",
                    "versions": [
                        {
                            "version": "< 1.4.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-05T16:42:25.771Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Plane is an open-source project management tool. Prior to 1.4.0, a Project Member with role 15 can send a PATCH request to the project-member update endpoint at /api/workspaces/{workspace_slug}/projects/{project_id}/members/{member_pk}/ to change another user's project role. The role-update logic blocks only a new role higher than the requester's role, so assigning the equal Member role bypasses the insufficient validation and promotes a Project Guest with role 5 to Member without Project Admin approval. This unauthorized promotion grants the guest the additional project capabilities associated with the Member role and allows a regular member to bypass project governance controls. This issue is fixed in 1.4.0."
                }
            ],
            "source": {
                "advisory": "GHSA-x63v-p7wc-47x4",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-07T20:51:39.176412Z",
                                "id": "CVE-2026-104955",
                                "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": "2026-10-07T20:52:04.227Z"
                }
            }
        ]
    }
}