{"id":"CVE-2026-107377","revision":"1f10f8c2cd044943955b14b8433eebbb","records":[{"revision":"1f10f8c2cd044943955b14b8433eebbb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107377","aliases":[],"title":"datamodel-code-generator: Protobuf weak-import path traversal allows files to be written outside the temporary directory","description":"datamodel-code-generator generates Python data models from schema definitions. From 0.59.0 until 0.81.0, an attacker-controlled Protobuf schema can supply absolute or parent-directory paths captured by WEAK_IMPORT_PATTERN and consumed by _write_missing_weak_imports in src/datamodel_code_generator/parser/protobuf.py. Exploitation requires a victim or automated job to process the attacker-controlled schema with Protobuf input support, which requires the grpcio-tools package. The paths escape the weak_imports temporary directory before protoc runs, allowing creation of directory trees and new files or overwrite of existing writable files with a generated Protobuf syntax declaration. The effect persists when later Protobuf compilation fails. The written content is limited to a proto2 or proto3 syntax declaration, and direct arbitrary code execution has not been demonstrated. This issue is fixed in version 0.81.0.","state":0,"publishedAt":"2026-10-08T17:55:22.595+00:00","modifiedAt":"2026-10-14T01:09:58.803+00:00","affected":[{"ecosystem":"Vendor product","name":"datamodel-code-generator","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"datamodel-code-generator\",\n                    \"product\": \"datamodel-code-generator\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.59.0, < 0.81.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/datamodel-code-generator/datamodel-code-generator/security/advisories/GHSA-77xj-x4rm-935c","https://github.com/datamodel-code-generator/datamodel-code-generator/commit/5e94b8f4203198798ec66b8e48217f70af69a0dc","https://github.com/datamodel-code-generator/datamodel-code-generator/releases/tag/0.81.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107377","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107377","identifiers":["CVE-2026-107377"]},"retained":false,"historicalAffected":[]}],"coverage":[]}