Yes
In our company we found real security issues in proprietary code using Opus 4.6/4.7
hodgesrm on Hacker News
In the thread “Greg Kroah-Hartman – Security in the LLM Age [video]”, replying to this comment
Helped: Using Opus 4.6/4.7 to scan proprietary code for vulnerabilities.
… For completeness that includes proprietary code stored in GitHub. In our company we found real security issues in proprietary code using Opus 4.6/4.7. Obviously typical attackers might have difficulty finding these without code access but Claude was finding real CVEs, which we fixed. …