Empirical Security API

openapi: 3.1.0
info:
  title: Empirical Security API
  version: '1.0'
  description: >-
    The Empirical Security API provides programmatic access to real-time
    exploitation prediction scores for CVEs. It exposes the Foundation
    (global) model, hourly-updated EPSS models (epss_v3/epss_v4/epss_v5),
    and organization-specific Radiant models, along with CVE detail,
    malware-hash, critical-indicator, score-history, change-history, and
    saved CVE-group endpoints. Authentication is OAuth 2.0 client
    credentials (JWT bearer).
  contact:
    name: Empirical Security
    url: https://docs.empiricalsecurity.com/
  x-provenance:
    generated: '2026-07-19'
    method: generated
    source: >-
      https://docs.empiricalsecurity.com/api_reference/cves,
      https://docs.empiricalsecurity.com/api_reference/search,
      https://docs.empiricalsecurity.com/api_reference/cve_groups,
      https://docs.empiricalsecurity.com/authentication,
      https://docs.empiricalsecurity.com/errors
servers:
  - url: https://app.empiricalsecurity.com/api
    description: Production
security:
  - oauth2: []
tags:
  - name: CVEs
    description: Retrieve CVE detail, scores, malware hashes and history.
  - name: Search
    description: Query CVEs using Empirical search syntax.
  - name: CVE Groups
    description: Saved CVE queries and their execution.
paths:
  /cves/{cve_id}:
    get:
      operationId: getCve
      summary: Retrieve a CVE by identifier
      description: Retrieve full detail and scores for a single CVE by its identifier.
      tags: [CVEs]
      parameters:
        - $ref: '#/components/parameters/CveId'
      responses:
        '200':
          description: CVE detail
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Cve'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/ServerError'
  /cves/{cve_id}/malware:
    get:
      operationId: getCveMalware
      summary: Retrieve malware hashes for a CVE
      description: Retrieve MD5/SHA1/SHA256 malware hashes associated with a CVE.
      tags: [CVEs]
      parameters:
        - $ref: '#/components/parameters/CveId'
        - name: accept
          in: query
          required: false
          description: Set to application/jsonl for JSON Lines output.
          schema:
            type: string
      responses:
        '200':
          description: Array of malware hash records
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/MalwareHash'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /cves/{cve_id}/critical_indicators:
    get:
      operationId: getCveCriticalIndicators
      summary: Retrieve critical indicators for a CVE
      description: Retrieve the scoring model analysis with weighted critical indicators for a CVE.
      tags: [CVEs]
      parameters:
        - $ref: '#/components/parameters/CveId'
      responses:
        '200':
          description: Critical indicator analysis
          content:
            application/json:
              schema:
                type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /cves/{cve_id}/score_history:
    get:
      operationId: getCveScoreHistory
      summary: Retrieve score history for a CVE
      description: Retrieve historical scores for a CVE for a given scoring model.
      tags: [CVEs]
      parameters:
        - $ref: '#/components/parameters/CveId'
        - name: scoring_model
          in: query
          required: true
          description: Scoring model key.
          schema:
            type: string
            enum: [global, epss_v3, epss_v4, epss_v5, all]
      responses:
        '200':
          description: Score history
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ScoreHistory'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /cves/{cve_id}/history:
    get:
      operationId: getCveHistory
      summary: Retrieve CVE change history
      description: Retrieve the array of change records (data and diff) for a CVE.
      tags: [CVEs]
      parameters:
        - $ref: '#/components/parameters/CveId'
      responses:
        '200':
          description: Array of change records
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /cves/all:
    get:
      operationId: getAllCves
      summary: Retrieve all CVEs
      description: >-
        Retrieve the full CVE dataset. Returns a 302 redirect to a gzipped
        JSONL file, or 202 when the file is being generated.
      tags: [CVEs]
      responses:
        '302':
          description: Redirect to gzipped JSONL export file.
        '202':
          description: Export file is being generated; retry later.
        '401':
          $ref: '#/components/responses/Unauthorized'
  /search:
    get:
      operationId: searchCves
      summary: Search CVEs
      description: Query CVEs using Empirical search syntax and an optional scoring model.
      tags: [Search]
      parameters:
        - name: q
          in: query
          required: false
          description: Query using Empirical search syntax (e.g. score:>90).
          schema:
            type: string
        - name: scoring_model
          in: query
          required: false
          description: Scoring/model key (e.g. epss_v5, global).
          schema:
            type: string
        - name: accept
          in: query
          required: false
          description: Set to application/jsonl for JSON Lines output.
          schema:
            type: string
      responses:
        '200':
          description: Array of matching CVEs
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Cve'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /cve_groups:
    get:
      operationId: listCveGroups
      summary: Retrieve saved CVE groups
      description: Retrieve the list of saved CVE groups (named queries).
      tags: [CVE Groups]
      responses:
        '200':
          description: Saved CVE groups
          content:
            application/json:
              schema:
                type: object
                properties:
                  cve_groups:
                    type: array
                    items:
                      $ref: '#/components/schemas/CveGroup'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /cve_groups/{id}:
    get:
      operationId: getCveGroup
      summary: Execute a specific CVE group
      description: Execute a saved CVE group and return its matching CVEs.
      tags: [CVE Groups]
      parameters:
        - name: id
          in: path
          required: true
          description: CVE group identifier.
          schema:
            type: string
        - name: scoring_model
          in: query
          required: false
          description: Scoring model key (e.g. epss_v5, global).
          schema:
            type: string
        - name: accept
          in: query
          required: false
          description: Set to application/jsonl for JSON Lines output.
          schema:
            type: string
      responses:
        '200':
          description: Array of CVE objects
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Cve'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  securitySchemes:
    oauth2:
      type: oauth2
      description: >-
        OAuth 2.0 client credentials flow via FusionAuth. Exchange client
        ID/secret (HTTP Basic) for a one-hour JWT access token, then send it
        as a Bearer token.
      flows:
        clientCredentials:
          tokenUrl: https://empiricalsecurity.fusionauth.io/oauth2/token
          scopes:
            'target-entity:0c6d5dcc-8bf0-4cd1-bd65-066ef0422369': >-
              Access to the Empirical Security tenant/entity's CVE data.
  parameters:
    CveId:
      name: cve_id
      in: path
      required: true
      description: CVE identifier in the format CVE-YYYY-NNNNN.
      schema:
        type: string
        pattern: '^CVE-\d{4}-\d{4,}$'
        example: CVE-2023-49103
  responses:
    Unauthorized:
      description: Authentication failed (missing or invalid token).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Resource not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    ServerError:
      description: Internal server error.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              description: String identifier for the error type.
            message:
              type: string
              description: Human-readable description of the error.
    Score:
      type: object
      properties:
        score:
          type: number
        percentile:
          type: number
        computed_at:
          type: string
          format: date-time
    Cve:
      type: object
      properties:
        identifier:
          type: string
          example: CVE-2023-49103
        description:
          type: string
        cvss:
          type: array
          items:
            type: object
        references:
          type: array
          items:
            type: object
        has_exploitation_activity:
          type: boolean
        scores:
          type: object
          additionalProperties:
            $ref: '#/components/schemas/Score'
    MalwareHash:
      type: object
      properties:
        md5:
          type: string
        sha1:
          type: string
        sha256:
          type: string
    ScoreHistory:
      type: object
      properties:
        identifier:
          type: string
        scores:
          type: object
          additionalProperties:
            type: array
            items:
              $ref: '#/components/schemas/Score'
    CveGroup:
      type: object
      properties:
        name:
          type: string
        id:
          type: string
        url:
          type: string
          format: uri
        query_string:
          type: string