3d (edited) • General discussion
Anthropic Claude Code Security Updates
Announced at Code with Claude London, May 19-20, 2026
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SELF-HOSTED SANDBOX (PUBLIC BETA)
Claude Managed Agents can now run tool execution inside your own
infrastructure instead of Anthropic-managed containers. Orchestration
stays on Anthropic's side, but code, filesystem, and network egress
stay in your environment.
Works with Cloudflare, Daytona, Modal, or Vercel as managed providers.
Built for orgs with data-residency, compliance, or internal-service-
access requirements.
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SECURITY-GUIDANCE PLUGIN (FREE, ALL PLANS)
Scans every file edit in real time for risky patterns like eval,
innerHTML, command injection, and XSS. Acts as a pre-write validation
hook that blocks unsafe writes.
Powered by Opus 4.7 by default. Install via:
/plugin install security-guidance
Anthropic's internal testing showed 30-40% reduction in security-
related PR comments. Catches roughly 25 dangerous patterns via regex
matching, so it handles low-hanging fruit, not semantic analysis.
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CONTEXT
Part of a broader security push.
- Anthropic's Mythos model recently flagged 23,000+ potential
vulnerabilities across 1,000+ OSS projects.
- Enterprise integrations expanded to 28 security and compliance
platforms.
- Two Claude Code sandbox vulnerabilities (privilege escalation,
network bypass) were patched in recent months, which explains
the demand.
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Anthropic Claude Code Security Updates
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