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Run the command in a project with a bun.lock file:
terminal
bun audit
Bun sends the list of installed packages and versions to npm, and prints a report of any vulnerabilities found. Packages installed from registries other than the default registry are skipped. If no vulnerabilities are found, the command prints: 
No vulnerabilities found
When vulnerabilities are detected, Bun lists each affected package with the severity, a short description, and a link to the advisory. At the end of the report it prints a summary and hints for updating: 
3 vulnerabilities (1 high, 2 moderate)
To update all dependencies to the latest compatible versions:
  bun update
To update all dependencies to the latest versions (including breaking changes):
  bun update --latest

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Filtering options

--audit-level=<low|moderate|high|critical> - Only show vulnerabilities at this severity level or higher:
terminal
bun audit --audit-level=high
--prod - Audit only production dependencies (excludes devDependencies):
terminal
bun audit --prod
--ignore <CVE> - Ignore specific CVEs (repeat the flag to ignore several):
terminal
bun audit --ignore CVE-2022-25883 --ignore CVE-2023-26136

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--json

Use the --json flag to print the raw JSON response from the registry instead of the formatted report:
terminal
bun audit --json

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Exit code

bun audit exits with code 0 if no vulnerabilities are found and 1 if the report lists any, including when --json is passed.