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Rule Reference

SEC632lintai-ai-securitygovernancehardeningstableclaude_settingswarn

Claude settings: bare WebFetch permissions

Claude settings permissions allow bare `WebFetch` 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 exact bare `WebFetch` grants.

Deterministic signal basis

ClaudeSettingsSignals exact string detection for bare `WebFetch` inside permissions.allow on parsed Claude settings JSON.

Malicious corpus
claude-settings-unscoped-tool-family
Benign corpus
claude-settings-unscoped-tool-family-specific-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

SEC632 / CLAUDE-WEBFETCH ​

SEC632 flags shared committed Claude settings when permissions.allow contains the exact bare tool token WebFetch.

Why It Matters ​

Bare WebFetch grants unreviewed remote fetch authority without narrowing access to reviewed domains or paths.

Trigger Shape ​

This rule matches parsed Claude settings JSON where permissions.allow contains the exact string WebFetch.

How To Fix ​

Replace bare WebFetch with a narrower reviewed permission pattern such as WebFetch(domain:docs.example.com), or remove broad fetch access from the shared Claude settings file.