{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-45274",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-11T18:41:13.156Z",
        "datePublished": "2026-08-19T14:38:58.849Z",
        "dateUpdated": "2026-08-19T15:23:12.071Z"
    },
    "containers": {
        "cna": {
            "title": "MyBooks: Unauthenticated Registration Bypass via Missing Server-Side ALLOW_REGISTER Enforcement",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-602",
                            "lang": "en",
                            "description": "CWE-602: Client-Side Enforcement of Server-Side Security",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 6.9,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/PoxenStudio/mybooks/security/advisories/GHSA-3q85-5vj5-qx5v",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/PoxenStudio/mybooks/security/advisories/GHSA-3q85-5vj5-qx5v"
                },
                {
                    "name": "https://github.com/PoxenStudio/mybooks/commit/a1780c98b00566af7da2fc099fe38500efc02e92",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PoxenStudio/mybooks/commit/a1780c98b00566af7da2fc099fe38500efc02e92"
                },
                {
                    "name": "https://github.com/PoxenStudio/mybooks/releases/tag/3.42.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PoxenStudio/mybooks/releases/tag/3.42.0"
                }
            ],
            "affected": [
                {
                    "vendor": "PoxenStudio",
                    "product": "talebook",
                    "versions": [
                        {
                            "version": "< 3.42.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-19T14:38:58.849Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "MyBooks is anebook management web server also known as Talebook. In 3.41.2 and earlier, the SignUp.post handler for POST /api/user/sign_up in webserver/handlers/user.py does not enforce the ALLOW_REGISTER configuration flag, even though the frontend hides registration controls when the flag is false. An unauthenticated remote attacker can call the endpoint directly and create a valid account on an instance whose administrator disabled public registration. The process_auth_header function in webserver/handlers/base.py also does not verify the account's active flag, so the newly created and unactivated account can authenticate immediately and access user-level API functionality. The bypass defeats the intended account-creation policy and can supply the low-privilege account required by related authorization vulnerabilities. This issue is fixed in version 3.42.0."
                }
            ],
            "source": {
                "advisory": "GHSA-3q85-5vj5-qx5v",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/PoxenStudio/mybooks/security/advisories/GHSA-3q85-5vj5-qx5v",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-19T15:22:55.400640Z",
                                "id": "CVE-2026-45274",
                                "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": "2026-08-19T15:23:12.071Z"
                }
            }
        ]
    }
}