# Report of a Cross-Tenant Data Leak in Claude Code Tests a Core Isolation Guarantee

A GitHub ticket describes another user's credentials, including an IP address and root access, appearing in an unrelated Claude Code session, as researchers press for runtime verification of agent actions.

- Published: 2026-07-08T05:30:03.109Z
- Canonical: https://polylog.news/ai/2026-07-08/report-of-a-cross-tenant-data-leak-in-claude-code-tests-a-co
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Polylog editors](https://polylog.news), [arXiv (Proof of Execution)](https://arxiv.org/abs/2607.05397)

A GitHub ticket circulating in developer channels, flagged by AI ML Big Data, reports that a Claude Code session unexpectedly showed another user's credentials, an IP address and root access in plaintext. If confirmed, that would break the…

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