{"id":"CVE-2021-21428","details":"Openapi generator is a java tool which allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. openapi-generator-online creates insecure temporary folders with File.createTempFile during the code generation process. The insecure temporary folders store the auto-generated files which can be read and appended to by any users on the system. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version.","aliases":["GHSA-23x4-m842-fmwf"],"modified":"2026-07-09T10:52:30.571548Z","published":"2021-05-10T19:15:08.060Z","references":[{"type":"FIX","url":"https://github.com/OpenAPITools/openapi-generator/pull/8788"},{"type":"EVIDENCE","url":"https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-23x4-m842-fmwf"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openapitools/openapi-generator","events":[{"introduced":"0"},{"fixed":"e023eaa8218da996140148161978953cc698d014"}],"database_specific":{"cpe":"cpe:2.3:a:openapi-generator:openapi_generator:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"5.1.0"}],"source":"CPE_RANGE"}}],"versions":["v5.0.0","v5.0.0-beta3","v5.0.0-beta2","v5.0.0-beta","v4.3.1","v4.3.0","v4.2.3","v4.2.2","v4.2.1","v4.2.0","v4.1.0","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v4.0.0-beta3","v4.0.0-beta2","v3.0.1","v3.0.0","v2.3.1","v2.3.0","v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.6","v2.1.5","v2.1.4","v2.1.3","v2.1.2","v2.1.0-M2","v2.1.2-M1","v2.1.1-M1","v2.1.0-M1","v2.0.18","2.0.17","swagger-codegen_2.9.1-2.0.1","swagger-codegen_2.9.1-2.0.0","swagger-codegen_2.9.1-1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21428.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}