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When you identify that a code scanning alert is a false positive—such as when your code uses a custom sanitization method not recognized by the analysis—you should dismiss the alert with the reason "false positive." This action helps improve the accuracy of future analyses and maintains the relevance of your security alerts.​

As per GitHub's documentation:​

"If you dismiss a CodeQL alert as a false positive result, for example because the code uses a sanitization library that isn't supported, consider contributing to the CodeQL repository and improving the analysis."​

By dismissing the alert appropriately, you ensure that your codebase's security alerts remain actionable and relevant.

Dependabot security updatesareautomated pull requeststriggered when GitHub detects avulnerabilityin a dependency listed in your manifest or lockfile. These PRs upgrade the dependency to theminimum safe versionthat fixes the vulnerability.

This is separate from regular updates (which keep versions current even if not vulnerable).