CVE-2017-1000207: Deserialization of Untrusted Data in swagger-codegen

The vulnerability stems from unsafe YAML deserialization using SnakeYAML's default Constructor in swagger-parser. The LGTM blog analysis explicitly identifies this pattern as the root cause (CVE-2017-1000207), and the fix in swagger-parser PR #481 involved modifying YAML parsing to use a restricted constructor. While swagger-codegen's 'generate'/'validate' commands trigger the vulnerability, the actual vulnerable implementation resides in the YAML parsing logic of swagger-parser. The YamlParser.parse method is the direct entry point for this unsafe deserialization.