Integrating Snyk Open Source C/C++ security scanning into CI pipelines
Blog post from Snyk
Snyk Open Source enables vulnerability scanning for vendored C and C++ dependencies through its CLI and CI/CD plugins, with projects scanned by adding the `--unmanaged` option to supported integrations such as Jenkins, Azure DevOps, GitHub Actions, and GitLab CI/CD. The `snyk test --unmanaged` command identifies dependencies, checks them against Snyk’s vulnerability database, can fail pipelines when issues are found, and supports JSON output that can be converted into HTML reports with `snyk-to-html`, while `snyk monitor --unmanaged` uploads a dependency snapshot to the Snyk dashboard for ongoing alerts about newly discovered vulnerabilities without failing builds. Recommended practice is to run monitoring regularly to keep dependency snapshots current, use testing on commits or branches to enforce security thresholds, and optionally chain both commands so monitoring occurs after a successful test. Resolving detected issues generally involves upgrading the affected vendored source package to a fixed version, while `--print-deps` can help validate Snyk’s signature-based dependency matching and its confidence score, and temporary ignores can be used when identification data has not yet caught up with a recent update. Snyk also notes ongoing work to improve source-code matching accuracy, database update frequency, and a planned vulnerability-database API for C/C++ components.
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