Potential session/cache leakage between workspace instances or consumer accounts

What happened

Security issue #74066 was filed on the Anthropic Claude Code GitHub repository documenting potential leakage of session data or cache between workspace instances and consumer accounts. Within hours it reached #1 on Hacker News with a score of 266 points.

Context and impact

If confirmed, this vulnerability would pose serious risks for enterprise Claude Code deployments where separate teams work with confidential codebases and proprietary context. Anthropic has not yet issued a public statement. Claude Code has seen significant enterprise adoption growth since Chrome GA launched in June 2026.

Details

• Issue #74066 filed by user chatmasta on GitHub, July 4, 2026
• Hacker News score: 266 points (top story of the day)
• Affects workspace-to-workspace or consumer account isolation
• Anthropic has not yet confirmed or denied the vulnerability
• Related to Claude Code's session infrastructure sharing across agent instances