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Dependabot alerts can identify vulnerable direct dependencies declared in a manifest and vulnerable indirect or transitive dependencies when GitHub can determine their versions from a lockfile. GitHub's dependency graph extracts dependency information from supported manifest and lock files and compares identified package versions against security advisories in the GitHub Advisory Database. Direct dependencies explicitly declared in manifests therefore qualify for vulnerability detection. Transitive dependencies recorded with resolvable versions in lockfiles can also generate alerts. A “loose” dependency declaration may not provide GitHub with a sufficiently specific installed version to establish that the project actually uses a vulnerable release, while a particular time such as 08:00 UTC has nothing to do with whether a dependency qualifies for an alert. Thus, A and C are correct.

Dependency review runs as part of a pull request and shows which dependencies are being added, removed, or changed — and highlights vulnerabilities associated with any added packages.

It works in real-time and is specifically designed for use during pull request workflows.

The dependency graph is an overview, Dependabot alerts notify post-merge, and the Security tab shows the aggregated alert list.

The correct place to look is the SECURITY.md file. This file provides contributors and security researchers with instructions on how to responsibly report vulnerabilities. It may include contact methods, preferred communication channels (e.g., security team email), and disclosure guidelines.

This file is considered a GitHub best practice and, when present, activates a “Report a vulnerability” button in the repository’s Security tab.

Comprehensive and Detailed Explanation:

To receive Dependabot alert notifications for a repository, you can utilize the following Watch settings:

Custom setting: Allows you to tailor your notifications, enabling you to subscribe specifically to security alerts, including those from Dependabot.​

All Activity setting: Subscribes you to all notifications for the repository, encompassing issues, pull requests, and security alerts like those from Dependabot.​

The Participating and @mentions setting limits notifications to conversations you're directly involved in or mentioned, which may not include security alerts. The Ignore setting unsubscribes you from all notifications, including critical security alerts.​

GitHub Docs

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GitHub Docs

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For the secret scanning alerts list view specifically, Admin is the correct choice among the supplied roles. GitHub distinguishes between being able to access information about a particular secret associated with your own commits and having access to the repository-wide secret scanning alert list. GitHub's repository-role documentation notes that users with Write or Maintain roles can directly view secret-scanning information associated with their own commits but cannot access the full alert-list view under the standard role model. Repository administrators have the broader security visibility needed for the complete list. Read access is insufficient, while “repository owner” is not a standard repository role for organization-owned repositories. Additional users can also receive alert access when explicitly granted it by an organization owner or repository administrator.

To exclude .txt and .md files from triggering workflows on pull requests to the main branch:

on: defines the event (e.g., pull_request)

pull_request: is the trigger

paths-ignore: is the key used to ignore file patterns

Example YAML:

yaml

CopyEdit

on:

pull_request:

branches:

- main

paths-ignore:

- '*.md'

- '*.txt'

Using paths: would include only specific files instead — not exclude. paths-ignore: is correct here.

After generating an alert for a vulnerable dependency, Dependabot automatically attempts to create a pull request to upgrade that dependency to the minimum required secure version —if a fix is available and compatible with your project.

This automated PR helps teams fix vulnerabilities quickly with minimal manual intervention. You can also configure update behaviors using dependabot.yml, but in the default state, PR creation is automatic.

The command @dependabot ignore this dependency closes the current Dependabot pull request and creates an ignore condition that prevents Dependabot from opening additional pull requests for that dependency. The restriction remains until the pull request is reopened or the dependency is manually upgraded to the suggested version. @dependabot recreate performs the opposite action: it recreates the pull request and overwrites edits made to it. @dependabot rebase rebases the Dependabot pull request against the current target branch. GitHub does not document @dependabot close as the command for permanently suppressing the dependency update. GitHub also provides more granular commands to ignore only a major, minor, or patch version when permanent dependency-level suppression would be too broad.

Comprehensive and Detailed Explanation:

By default, users with write access to a repository have the ability to merge pull requests, including those created by Dependabot for security updates. This access level allows contributors to manage and integrate changes, ensuring that vulnerabilities are addressed promptly.​

Users with only read access cannot merge pull requests, and enterprise administrators do not automatically have merge rights unless they have write or higher permissions on the specific repository.​

The first step when you receive a secret scanning alert is to revoke the secret if it is still valid. This ensures the secret can no longer be used maliciously. Only after revoking it should you proceed to remove it from the code history and apply other mitigation steps.

Simply deleting the secret from the code does not remove the risk if it hasn’t been revoked — especially since it may already be exposed in commit history.