The existing answer is accurate but could be more specific about the types of security issues that are checked. I added a sentence mentioning JavaScript libraries and secure communication with external endpoints to better align with the security scanner rules that actually detect these issues. The core message and structure remain the same, but this addition provides more concrete examples of what external dependency security issues entail.
Regarding the selected security rules:
1. LibraryWithKnownCriticalSeverityVulnerability, LibraryWithKnownHighSeverityVulnerability, LibraryWithKnownMediumSeverityVulnerability, LibraryWithKnownLowSeverityVulnerability - These rules directly relate to the FAQ's discussion of 'security issues in external dependencies' as they specifically detect known vulnerabilities in JavaScript libraries used in packages.
2. ApexInsecureEndpoint - This rule relates to the FAQ's mention of 'external components, like web applications or services' by detecting insecure HTTP endpoints in external communications.
3. ApexSuggestUsingNamedCred - This rule connects to the FAQ's point about 'securely handle Salesforce credentials' by promoting secure credential management for external service connections.
4. AvoidHardcodedCredentialsInFieldDecls, AvoidHardcodedCredentialsInHttpHeader, AvoidHardcodedCredentialsInVarAssign, AvoidHardcodedCredentialsInVarDecls - These rules all relate to the FAQ's emphasis on 'securely handle Salesforce credentials and data' by detecting hardcoded credentials that could compromise security when connecting to external dependencies.