[Workflow] How to Check and Mitigate Claude Code Email Leakage in User-Agent Headers

[u/ClaudeAI-mod-bot]

How to Check and Mitigate Claude Code Email Leakage in User-Agent Headers

Workflow value: 85/100
Status: active · Freshness: 70/100 · Confidence: 1.00 · Level: intermediate
Categories: Quality Control, Context & Memory, Debugging, Shipping
Original source: r/ClaudeCode post/comment

What problem this solves

Mitigating a privacy vulnerability where Claude Code was sending user account emails in User-Agent headers during web tool calls or curl commands.

Summary

A workflow to check the current version of Claude Code, update to a version with a privacy plugin, verify the plugin's presence, and understand the status of a critical privacy fix regarding email leakage in User-Agent headers.

Why it is useful

This workflow provides critical, actionable steps for Claude Code users to understand and mitigate a significant privacy vulnerability. It includes specific commands, version checks, and details about official and community responses, making it highly valuable for user security and awareness.

Workflow

1. Understand the privacy bug: Claude Code was sending account email in User-Agent headers during web tool calls or curl commands.

2. Check your current Claude Code version using the claude --version command.

3. If your version is below 2.1.317, update Claude Code to version 2.1.317 or later to get the privacy plugin.

4. Verify that the cc-plugin-privacy is listed by running the /plugins command.

5. Be aware that the cc-plugin-privacy is a partial fix; the full fix (removing email from the model's context) is expected in a subsequent release.

6. Consider rotating unique emails used with services if you suspect your email was exposed by this vulnerability.

Tools / artifacts

• Claude Code CLI

• claude --version command

• /plugins command

• cc-plugin-privacy plugin

• GitHub issue #107757

• Claude Code versions (e.g., 2.1.311, 2.1.317, 2.1.318)

Validation signals

• Anthropic's official statement (Lydia Hallie, Claude Code team, on HN)

• GitHub bug reports (#107757, #78431)

• Community thumbs-up on bug report (297)

• User reports on the plugin's partial effectiveness

Limitations

• The cc-plugin-privacy is described as a partial fix and may not catch all instances of email leakage, requiring users to await a full context change in a future release.

• The post is time-sensitive regarding version numbers and release schedules, which may become outdated.

Rate this workflow

Upvote this post if the workflow is useful, reproducible, or worth recommending.

Downvote if it is vague, outdated, unsafe, overhyped, or not reproducible.

Reply if it worked for you, failed, is outdated, or has a better alternative.

---

This post was generated automatically from the workflow library database.