CVE-2021-34801: Denial of service in Valine

The vulnerability manifests when processing truncated User-Agent strings, suggesting the UA parsing logic fails to handle incomplete formats. While exact implementation details aren't available, the CWE-94 classification and issue reports indicate the system executes code based on UA input without proper validation. This would cause unhandled exceptions when parsing malformed UA strings, preventing comment loading. The medium confidence reflects the lack of direct code access, but the pattern matches common UA parsing vulnerabilities in client-side JS systems.