{"id":"CVE-2026-55391","summary":"datamodel-code-generator vulnerable to SSRF protection bypass via DNS rebinding","details":"datamodel-code-generator generates Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON, YAML, or CSV. Prior to 0.63.0, datamodel-code-generator validates a URL host once in src/datamodel_code_generator/http.py through get_body, _validate_url_for_fetch, and _get_ips_from_host, but then lets httpx resolve the host again for the connection, allowing DNS rebinding to bypass allow_private_network=False and reach internal services. This issue is fixed in version 0.63.0.","aliases":["GHSA-vx7x-vcc2-c44g"],"modified":"2026-07-31T03:33:59.035543381Z","published":"2026-07-28T21:45:39.058Z","database_specific":{"cwe_ids":["CWE-350","CWE-367","CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55391.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.63.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55391.json"},{"type":"ADVISORY","url":"https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-vx7x-vcc2-c44g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55391"},{"type":"FIX","url":"https://github.com/koxudaxi/datamodel-code-generator/commit/25c8b7e497419eb20b230fa3318c04f9bebc5a6f"},{"type":"EVIDENCE","url":"https://gist.github.com/thegr1ffyn/c1d54dd6ff2a4c0d7d0dabe00c4985f4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/koxudaxi/datamodel-code-generator","events":[{"introduced":"0"},{"fixed":"25c8b7e497419eb20b230fa3318c04f9bebc5a6f"},{"fixed":"a1252a218df10537cd0526ae69757cde446a1ce6"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"0.63.0"}]}}],"versions":["0.62.0","0.61.0","0.60.2","0.60.1","0.60.0","0.59.1","0.59.0","0.58.0","0.57.0","0.56.1","0.56.0","0.55.0","0.54.1","0.54.0","0.53.0","0.52.2","0.52.1","0.52.0","0.51.0","0.50.0","0.49.0","0.48.0","0.47.0","0.46.0","0.45.0","0.44.0","0.43.1","0.43.0","0.42.2","0.42.1","0.42.0","0.41.0","0.40.0","0.39.0","0.38.0","0.37.0","0.36.0","0.35.0","0.34.0","0.33.0","0.32.0","0.31.2","0.31.1","0.31.0","0.30.2","0.30.1","0.30.0","0.29.0","0.28.5","0.28.4","0.28.3","0.28.2","0.28.1","0.28.0","0.27.3","0.27.2","0.27.1","0.27.0","0.26.5","0.26.4","0.26.3","0.26.2","0.26.1","0.26.0","0.25.9","0.25.8","0.25.7","0.25.6","0.25.5","0.25.4","0.25.3","0.25.2","0.25.1","0.25.0","0.24.2","0.24.1","0.24.0","0.23.0","0.22.1","0.22.0","0.21.5","0.21.4","0.21.3","0.21.2","0.21.1","0.21.0","0.20.0","0.19.0","0.18.1","0.18.0","0.17.2","0.17.1","0.17.0","0.16.1","0.16.0","0.15.0","0.14.1","0.14.0","0.13.5","0.13.4","0.13.3","0.13.2","0.13.1","0.13.0","0.12.3","0.12.2","0.12.1","0.12.0","0.11.20","0.11.19","0.11.18","0.11.17","0.11.16","0.11.15","0.11.14","0.11.13","0.11.12","0.11.11","0.11.10","0.11.9","0.11.8","0.11.7","0.11.6","0.2.11","0.11.5","0.11.4","0.11.3","0.11.2","0.11.1","0.11.0","0.10.3","0.10.2","0.10.1","0.10.0","0.9.4","0.9.3","0.9.2","0.9.1","0.9.0","0.8.3","0.8.2","0.8.1","0.8.0","0.7.3","0.7.2","0.7.1","0.7.0","0.6.26","0.6.25","0.6.24","0.6.23","0.6.22","0.6.21","0.6.20","0.6.19","0.6.18","0.6.17","0.6.16","0.6.15","0.6.14","0.6.13","0.6.12","0.6.11","0.6.10","0.6.9","0.6.8","0.6.7","0.6.6","0.6.5","0.6.4","0.6.3","0.6.2","0.6.1","0.6.0","0.5.39","0.5.38","0.5.37","0.5.36","0.5.35","0.5.34","0.5.33","0.5.32","0.5.31","0.5.30","0.5.29","0.5.28","0.5.27","0.5.26","0.5.25","0.5.24","0.5.23","0.5.22","0.5.21","0.5.20","0.5.19","0.5.18","0.5.17","0.5.16","0.5.15","0.5.14","0.5.13","0.5.12","0.5.11","0.5.10","0.5.9","0.5.8","0.5.7","0.5.6","0.5.5","0.5.4","0.5.3","0.5.2","0.5.1","0.5.0","0.4.11","0.4.10","0.4.9","0.4.8","0.4.7","0.4.6","0.4.5","0.4.4","0.4.3","0.4.2","0.4.1","0.4.0","0.3.3","0.3.2","0.3.1","0.3.0","0.2.16","0.2.15","0.2.14","0.2.13","0.2.12","0.2.10","0.2.9","0.2.8","0.2.7","0.2.6","0.2.5","0.2.4","0.2.3","0.2.2","0.2.1","0.2.0","0.1.0","0.0.6","0.0.5","0.0.4","0.0.3","0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55391.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N"}]}