Achieved flagship-level coding performance, surpassing the larger Qwen3.5-397B-A17B model on all major coding benchmarks.

Announced 46:1 context cache ratio for managing 39 projects and integration with FastMCP

Released Playwright MCP Server for generating web tests from natural language prompts

Critical security vulnerabilities (CVE-2026-35022) disclosed, requiring immediate patching and cessation of authentication helper use.

Anthropic releases Claude Code CLI version 0.2.87, which is later found to contain critical vulnerabilities.

Critical security vulnerabilities (CVE-2026-35022) disclosed in Claude Code versions ≤2.1.87, requiring immediate updates.

Anthropic releases Claude Code version 2.1.87, which is later found to contain critical vulnerabilities.