---
id: CVE-2026-73656
title: >-
  Trigger.dev is a platform for building and deploying fully managed AI agents
  and workflows
summary: >-
  Trigger.dev is a platform for building and deploying fully managed AI agents
  and workflows. Prior to 4.5.6, POST
  /api/v1/deployments/:deploymentId/background-workers calls
  CreateDeploymentBackgroundWorkerServiceV4.call() in apps/webapp/a…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H'
cwe:
  - CWE-639
  - CWE-862
published: '2026-08-13'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:09:01.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73656'
references:
  - url: >-
      https://github.com/triggerdotdev/trigger.dev/commit/34b1a181c2a1d33a53ebab88f84b05f81fea4254
    label: security-advisories@github.com
  - url: 'https://github.com/triggerdotdev/trigger.dev/pull/4199'
    label: security-advisories@github.com
  - url: 'https://github.com/triggerdotdev/trigger.dev/releases/tag/v4.5.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/triggerdotdev/trigger.dev/security/advisories/GHSA-j6vv-pq9h-f4wj
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00342
epssPercentile: 0.27846
ingestedAt: '2026-09-18T20:51:25.611Z'
---

## Overview

Trigger.dev is a platform for building and deploying fully managed AI agents and workflows. Prior to 4.5.6, POST /api/v1/deployments/:deploymentId/background-workers calls CreateDeploymentBackgroundWorkerServiceV4.call() in apps/webapp/app/v3/services/createDeploymentBackgroundWorkerV4.server.ts, where workerDeployment.findFirst() selects a deployment by friendlyId without an environmentId predicate. A caller with a valid API key for one project can submit another project's deployment identifier, link an attacker-owned background worker to the victim deployment, and move the victim deployment from BUILDING to DEPLOYING. This issue is fixed in version 4.5.6.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.