# Dismiss or reopen a code scanning alert

> Dismiss a code scanning alert (state dismissed, dismissed_reason false_positive, wont_fix or used_in_tests, optional dismissed_comment) or reopen it (state open).

<div class="g1t-endpoint"><span class="g1t-method" data-method="patch">PATCH</span><code>/repos/{owner}/{name}/code-scanning/alerts/{number}</code></div>

A fixed alert reopens by itself when an analysis reports it again.

- **Authentication:** Required. Send an [access token](/reference/api/#authentication) as `Authorization: Bearer`.
- **MCP tool:** [`security`](/reference/mcp/#security) with `action` `update_code_alert`, and the same inputs
- **Scope:** An access token needs [`security:write`](/guides/authentication/#scopes).

## Path parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `owner` | string | Yes | The workspace that owns the repository. |
| `name` | string | Yes | The repository's name. |
| `number` | integer | Yes | The code scanning alert's number. |

## Body parameters

Send a JSON object. Names are `snake_case`, as in responses; the `camelCase` spelling is accepted too.

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `state` | string | Yes | dismissed, with a reason, or open to reopen. One of `open`, `dismissed`. |
| `dismissed_reason` | string | No | Why it is dismissed. One of `false_positive`, `wont_fix`, `used_in_tests`. |
| `dismissed_comment` | string | No | Why, in a sentence; kept with the alert. At most 500 characters. |

## Example request

```sh
curl -X PATCH https://api.g1t.sh/repos/flagon-io/hello/code-scanning/alerts/4 \
  -H "Authorization: Bearer $G1T_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "state": "dismissed",
    "dismissed_reason": "false_positive",
    "dismissed_comment": "The argument is a constant."
  }'
```

## Example response

A successful request answers `200` with:

```json
{
  "id": "cod_01kq2qag7h8j9k0m1n2p3q4r5s",
  "number": 4,
  "repo_id": "rep_01kp0a1b2c3d4e5f6g7h8j9k0m",
  "tool": "Semgrep OSS",
  "category": "Semgrep OSS",
  "rule_id": "javascript.lang.security.detect-child-process.detect-child-process",
  "rule_name": "javascript.lang.security.detect-child-process.detect-child-process",
  "rule_description": "Detected calls to child_process from a function argument.",
  "help": null,
  "help_uri": "https://semgrep.dev/r/javascript.lang.security.detect-child-process.detect-child-process",
  "tags": [
    "security",
    "CWE-78"
  ],
  "level": "error",
  "security_severity": null,
  "severity": "high",
  "message": "Detected calls to child_process from a function argument `req`. This could lead to a command injection.",
  "path": "src/server.js",
  "start_line": 6,
  "end_line": 6,
  "start_column": 3,
  "end_column": 60,
  "state": "dismissed",
  "fingerprint": "3f1c9a0e7b2d4c5e6f708192a3b4c5d6",
  "first_commit": "4807077b296e6edbf410d55e72749d3e1170c291",
  "last_commit": "4807077b296e6edbf410d55e72749d3e1170c291",
  "created_at": "2026-10-06T09:14:02.118Z",
  "updated_at": "2026-10-06T09:14:02.118Z",
  "fixed_at": null,
  "dismissed_by": "syntaqx",
  "dismissed_reason": "false_positive",
  "dismissed_comment": "The argument is a constant.",
  "dismissed_at": "2026-10-06T09:20:41.502Z",
  "issue": null
}
```

## Errors

A failed request answers with one of these statuses and a body like `{"error": {"code": "not_found", "message": "Repository not found."}}`. See [errors](/reference/api/#errors).

| Status | Code | When |
| --- | --- | --- |
| 401 | `unauthenticated` | A token is required, or the one sent is not valid. |
| 403 | `forbidden` | The token is valid but not allowed to do this, such as a member-only change or an agent token outside its repository. |
| 404 | `not_found` | It does not exist, or you cannot see it. |
| 409 | `conflict` | The request conflicts with the current state. |
| 422 | `invalid` | The input is not valid. `message` says which field and why. |