Anthropic's Claude Mythos AI model was tested against curl's 178,000 lines of code and reportedly found five confirmed security issues. Upon review, three were known vulnerabilities, one was a bug, and only one was a new, low-severity vulnerability confirmed by curl developers. This vulnerability will be patched by late June. Curl's lead developer and others note that Mythos' findings do not surpass previous AI tools' results and that curl's extensive prior audits contribute to the limited new findings. Curl remains widely deployed but has no known active exploits for its 188 assigned CVEs. The findings suggest Mythos may not be as advanced as claimed or that curl's security is robust.

The impact is limited to a single low-severity vulnerability in curl, which is scheduled for patching. There are no known exploits in the wild for this or other curl vulnerabilities. Curl is widely used, but exploitation is difficult and no active attacks have been reported. The overall risk to users is low at this time.

A patch for the identified low-severity curl vulnerability is planned for release in late June. Users should apply this official fix once available. There is no immediate action required until the patch is released. The curl development team continues to maintain and audit the codebase to ensure security.