The analysis could not identify specific vulnerable functions because the relevant patch information was not found. The GitHub security advisory (GHSA-66m2-gx93-v996) for CVE-2025-59829 confirms the vulnerability and the patched version (1.0.120) for the @anthropic-ai/claude-code npm package. However, attempts to locate this version or its corresponding commits in the anthropics/claude-code GitHub repository were unsuccessful. The repository's tags do not include v1.0.120 or any 1.x.x versions, only 2.x.x versions. Without access to the specific commit that introduced the fix, it is not possible to determine the exact functions modified to address the symlink vulnerability. The core issue described is a failure to account for symlinks when checking permission deny rules, implying that functions responsible for file path resolution, access control checks, or file system operations would be involved. However, without the patch, these functions cannot be precisely identified.