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SEC418lintai-ai-securitygovernancehardeningstableclaude_settingswarn

Claude settings: shared raw.githubusercontent.com WebFetch permissions

Claude settings permissions allow `WebFetch(domain:raw.githubusercontent.com)` in a shared committed config

Public lane
governance
Category
hardening
Provider
lintai-ai-security
Scope
per-file
Surface
claude_settings
Tier
stable
Severity
warn
Confidence
high
Detection
structural
Remediation
message only
How to read this lane

Shared authority and workflow policy review.

How to read this category

Least-privilege, provenance, or operational hygiene signal.

Activation Model

Preset Activation

These presets explain where this rule appears in the product experience.

governancesidecar lane
claudesurface preset

Lifecycle

Stable Lifecycle Contract

State

stable

Graduation rationale

Checks shared Claude settings permissions for explicit raw GitHub content fetch grants.

Deterministic signal basis

ClaudeSettingsSignals exact string detection for `WebFetch(domain:raw.githubusercontent.com)` inside permissions.allow on parsed Claude settings JSON.

Malicious corpus
claude-settings-webfetch-raw-github-permission
Benign corpus
claude-settings-webfetch-raw-github-fixture-safe
structured evidence required remediation reviewed
Canonical note

Structural stable rule intended as a high-precision check with deterministic evidence.

Nearby Signals

Related Rules

SEC362Claude settings: wildcard Bash permissionsClaude settings permissions allow `Bash(*)` in a shared committed configgovernancehardeningclaude_settings
SEC364Claude settings: bypassPermissions default modeClaude settings set `permissions.defaultMode` to `bypassPermissions` in a shared committed configgovernancehardeningclaude_settings
SEC367Claude settings: wildcard WebFetch permissionsClaude settings permissions allow `WebFetch(*)` in a shared committed configgovernancehardeningclaude_settings
SEC369Claude settings: wildcard Write permissionsClaude settings permissions allow `Write(*)` in a shared committed configgovernancehardeningclaude_settings
SEC372Claude settings: wildcard Read permissionsClaude settings permissions allow `Read(*)` in a shared committed configgovernancehardeningclaude_settings
SEC373Claude settings: wildcard Edit permissionsClaude settings permissions allow `Edit(*)` in a shared committed configgovernancehardeningclaude_settings

SEC418 / CLAUDE-WEBFETCH-RAW-GITHUB ​

Claude settings permissions allow WebFetch(domain:raw.githubusercontent.com) in a shared committed config.

Why It Matters ​

raw.githubusercontent.com serves direct repository file contents. Granting fetch access to that domain in shared Claude settings makes it easy for an agent to pull mutable remote content outside the normal repository review path.

Trigger Shape ​

This rule applies to committed shared Claude settings files and triggers only on the exact permission token:

  • WebFetch(domain:raw.githubusercontent.com)

Clean Cases ​

  • WebFetch(domain:developers.openai.com)
  • WebFetch(domain:github.com)
  • no WebFetch grants at all

Example Trigger ​

json
{
  "permissions": {
    "allow": [
      "WebFetch(domain:raw.githubusercontent.com)"
    ]
  }
}

How To Fix ​

  • remove the raw-content fetch grant
  • or replace it with a narrower reviewed documentation source