- Sanitize MCP tool result text with recursivelySanitizeUnicode() to prevent
Unicode injection via malicious MCP servers (tool definitions and prompts
were already sanitized, but tool call results were not)
- Read sandbox.enabled only from trusted settings sources (user, local, flag,
policy) — exclude projectSettings to prevent malicious repos from silently
disabling the sandbox via .claude/settings.json
- Disable git hooks in plugin marketplace clone/pull/submodule operations
with core.hooksPath=/dev/null to prevent code execution from cloned repos
- Remove ANTHROPIC_FOUNDRY_API_KEY from SAFE_ENV_VARS to prevent credential
injection from project-scoped settings without trust verification
- Add ssrfGuardedLookup to WebFetch HTTP requests to block DNS rebinding
attacks that could reach cloud metadata or internal services
Security: closes trust boundary gap where project settings could override
security-critical configuration. Follows the existing pattern established
by hasAllowBypassPermissionsMode() which already excludes projectSettings.
Co-authored-by: auriti <auriti@users.noreply.github.com>
c0354e8699