2026-10-11 17:11 UTC

Anthropic will confirm and remediate Claude Code’s reported inclusion of users’ real email addresses in curl User-Agent strings and clarify which versions and workflows were affected.

state: expiredheat: lowuncertainty: highconvergesscott: mediumclaude-code developer-privacy agentic-securityAnthropic

What is this?

A report alleges that Claude Code exposed users’ real email addresses by placing them in User-Agent strings generated for curl commands. The supplied web answer says Anthropic fixed the issue in Claude Code 2.1.221, but the visible release-note snippet does not mention the email or User-Agent bug, and none of the supplied snippets establishes an official confirmation, affected workflows, or version range. The available evidence therefore leaves the remediation claim and scope insufficiently substantiated.

Why it matters to Scott

If confirmed, the Claude Code incident would provide consequential vendor-scale evidence for Scott’s existing position that raw PII must be tokenised before reaching an agent or its tool boundary. It also bears directly on his Claude Code session archive and privacy-sensitive agent systems, but the lack of substantiated Anthropic confirmation, affected-version scope, or remediation details currently limits the actionable diff.
ip:concept.proxy-mediated-tokenisationdev:concept.privacy-tokenized-agent-boundarydev:project.silo-osdev:project.search-conversationsradar:concept.ai-privacyradar:concept.coding-agent-securityradar:codex-private-repo-upload
queries asked of Scott's wikis
  • developer-tool identity leakage through generated commands
  • PII propagation in agent tool calls and HTTP metadata
  • privacy boundaries for coding-agent telemetry
  • security review of generated shell commands
  • credential and identity masking in agent harnesses
  • incident disclosure standards for AI developer tools

Measured heat

no measured readings yet — the hourly heat pass fills this in

How the heat travelled

no chain yet — the hourly chain pass fills this in

Evidence (1) — ⭐ canonical anchor

sourceobjectauthorscorecomments
🟧 hn ⭐Claude Code is leaking real email address as a User-Agent string in curl commandmatada_3529

Interpretation history

Decision trace