> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/security-testing-orchestration/use-sto/harness-security-scanners/shared/custom-scan/fail-on-severity.md).

# Fail On Severity

If the scan finds any vulnerability with the specified [severity level](/security-testing-orchestration/new-to-sto/key-concepts/severities.md) or higher, the pipeline fails automatically. `NONE` means do not fail on severity.

For more information, go to:

* [STO workflows for blocking builds and PRs](/security-testing-orchestration/troubleshooting-and-resources/sto-use-cases/stop-builds-based-on-scan-results/stop-pipelines-overview.md).
* [Exemptions to override Fail on Severity thresholds for specific issues in STO](/security-testing-orchestration/use-sto/sto-exempt-issues/exemption-workflows.md)

**Key**

```
fail_on_severity
```

**Value**

```
CRITICAL
```

```
MEDIUM
```

```
LOW
```

```
INFO
```

```
NONE
```