Generally no. SAST analyzes the code your team wrote for insecure patterns. It does not normally compare the libraries you import against known vulnerability records. That job belongs to software composition analysis (SCA). A project can pass a SAST scan cleanly and still ship a library with a published flaw.
Two different questions
SAST asks: did we write something unsafe? Think string built SQL, unchecked file paths or hardcoded keys. SCA asks: did we pull in something that others already found unsafe? It reads manifests and lockfiles, builds a list of direct and transitive packages, and matches versions to advisory databases.
Some products bundle both. Bundled does not mean the same technique. The inputs differ: source files for SAST, dependency metadata for SCA.
Side by side
| SAST | SCA | |
|---|---|---|
| Input | Your source code | Manifests, lockfiles, built artifacts |
| Finds | Insecure code patterns | Known vulnerable packages, license issues |
| Reports | File and line | Package, version, fixed version |
| Blind spot | Libraries you did not write | Flaws in your own logic |
| Typical fix | Edit your code | Upgrade or replace a package |
Why both matter
OWASP describes SAST as good at well known flaws such as buffer overflows and SQL injection, but weak on a large share of application flaws overall. Your own code is only part of what runs. In many applications, most of the executable code arrives through dependencies, so a program with SAST alone has a large unexamined area.
How to check your own setup
- List the scanners in your pipeline and write down the input of each.
- Look for a step that reads lockfiles or an SBOM. If none exists, you have no SCA.
- Run a scan on one repo and confirm it reports transitive packages, not only those named in the manifest.
- Decide who owns upgrades, and how fast.
Common mistakes
Teams often assume a product labeled application security covers everything. Ask each vendor or tool a direct question: does it read my lockfile, and does it report transitive packages? Also ask how often advisory data refreshes. A tool that checks dependencies once at build time will not tell you about advisories published next month, so recheck on a schedule. Finally, track both kinds of findings in one list so owners see the full picture and nothing falls between two reports.
Try it yourself
Click through it at your own pace, or open it full screen.
Open a dependency inventory and spot which packages come in indirectly.
Where Safeguard fits
Safeguard provides SBOM and dependency scanning with reachability analysis, so you can see which vulnerable packages your code actually calls. The free scan is a quick way to see your own dependency list.
Quick check
Is SCA the same as an SBOM?
No. An SBOM is an inventory of components. SCA uses an inventory like that to look for known problems.
If my SAST tool also lists vulnerable libraries, do I need SCA?
Check what it reads. If it covers transitive packages and updates its advisory data, it is doing SCA work. If not, add a dedicated step.
Sources
Last reviewed: 19 October 2026.
