CVE-2026-73656

Critical

Description

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.

SeverityCritical

CVSS9.9

Exploit probability—

ProductTriggerdotdev Trigger.dev

PublishedAug 13, 2026

First seenAug 13, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key CWE-862Missing authorization

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
triggerdotdev trigger.dev	< 4.5.2	—

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