CVE-2026-73656
Auth bypass allows linking attacker-owned workers to other projects' deployments.
Is CVE-2026-73656 being exploited?
Not confirmed. CVE-2026-73656 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2026-73656?
CVE-2026-73656 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-73656?
Yes. A fix has been recorded for CVE-2026-73656. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-73656 affect?
CVE-2026-73656 affects Trigger.dev < 4.5.6, Trigger.dev webapp API POST /api/v1/deployments/:deploymentId/background-workers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-73656?
Upgrade to Trigger.dev v4.5.6, rotate API keys, and audit deployments.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authorization bypass: attacker with a project API key can attach a malicious background worker to another project's deployment and move it from BUILDING to DEPLOYING, enabling unauthorized task execution or disruption.
Immediate action required
- affected< 4.5.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.