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Rule Reference

SEC415lintai-ai-securitystableclaude_settingswarn

Claude settings: shared git branch permissions

Claude settings permissions allow `Bash(git branch:*)` 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 wildcard git branch mutation grants.

Deterministic signal basis

ClaudeSettingsSignals exact string detection for `Bash(git branch:*)` inside permissions.allow on parsed Claude settings JSON.

Malicious corpus
claude-settings-git-branch-permission
Benign corpus
claude-settings-git-branch-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

SEC415 / CLAUDE-GIT-BRANCH-PERMISSION ​

SEC415 flags shared Claude settings when permissions.allow grants the exact wildcard permission Bash(git branch:*).

Why It Matters ​

git branch mutates repository branch structure and can redirect collaboration flow. Granting it broadly in shared AI policy makes branch mutation part of the default team execution surface, which is harder to review and easier to over-apply than a narrower, task-specific command.

Trigger Shape ​

The rule triggers only when all of these are true:

  • the file is a detected Claude settings surface
  • the path is not fixture-like
  • permissions.allow contains the exact string Bash(git branch:*)

Clean Cases ​

These stay clean:

  • more specific permissions such as Bash(git branch feature/test)
  • settings files that do not grant git branch at all
  • fixture-like examples under test or fixture paths

Example Trigger ​

json
{
  "permissions": {
    "allow": ["Bash(git branch:*)", "Read(*)"]
  }
}

Safer Example ​

json
{
  "permissions": {
    "allow": ["Bash(git branch feature/test)", "Read(*)"]
  }
}

How To Fix ​

Remove shared Bash(git branch:*) permissions or replace them with a narrower reviewed command pattern that keeps branch mutation under explicit user control.