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Rule Reference

SEC632lintai-ai-securitystableclaude_settingswarn

Claude settings: bare WebFetch permissions

Claude settings permissions allow bare `WebFetch` in a shared committed config

Provider
lintai-ai-security
Surface
claude_settings
Scope
per_file
Tier
stable
Severity
warn
Confidence
high
Detection
structural
Remediation
message_only

Activation Model

Preset Membership

This rule is part of the builtin activation graph through these preset memberships.

previewmembership
claudemembership

Lifecycle

Stable Lifecycle Contract

State

stable_gated

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

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.