Anthropic Gives Open Source Maintainers a Fast Track to Mythos Vulnerability Findings

Anthropic has introduced OSS Scanner, a free opt-in service that uses Claude models including Mythos to identify potential vulnerabilities in open source projects and provide maintainers with reproducible reports and, when possible, proposed fixes without prior human validation. The service responds to a backlog created by large volumes of AI-generated findings, as Anthropic identified more than 29,000 candidates in six months but manually reviewed only about 6,000, while early testing found that 85 of 97 high- and critical-severity reports met its disclosure standards. Projects such as Mozilla, PostgreSQL, wolfSSL, and curl have already used AI-assisted auditing to identify and fix vulnerabilities, though maintainers note that handling reports can require substantial engineering capacity and that severity assessments may not always reflect a project’s threat model. Eligible projects must supply an offline build environment and can define attack surfaces, exclusions, and severity criteria, while retaining the ability to pause or withdraw from the program. Anthropic says OSS Scanner is part of a broader effort to automate security triage and patch development, while continuing human-reviewed disclosures and funding organizations that help open source maintainers manage vulnerability reports.

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