GHSA-2jf5-6wwv-vhxx · Severity: high · Ecosystem: npm — Inngest TypeScript SDK exposes environment variables via serve() handler on unhandled HTTP methods
Inngest is a platform for running event-driven and scheduled background functions with queueing, retries, and step orchestration. Versions 3.22.0 through 3.53.1 contain a vulnerability that allows unauthenticated remote attackers to exfiltrate environment variables from the host process via the serve() HTTP handler. The serve() handler implements GET, POST, and PUT methods. Requests using PATCH, OPTIONS, or DELETE fall through to a generic handler that returns diagnostic information. A change introduced in v3.22.0 caused this diagnostic response to include the contents of process.env, exposing any secrets, API keys, or credentials present in the environment. An application is vulnerable if its serve() endpoint is reachable via PATCH, OPTIONS, or DELETE requests, which is common in setups like Next.js Pages Router or Express's app.use(...). Not affected are Next.js App Router handlers that export only GET, POST, and PUT, and applications using the connect worker method. This issue has been fixed in version 3.54.0. To work around this issue if upgrading is not immediately possible, restrict the serve() endpoint at the framework or reverse-proxy layer to accept only GET, POST, and PUT. The Inngest serve() endpoint does not require any other HTTP methods.
Conclusion & alert: CVE-2026-42047 is rated Moderate Risk (45.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.38%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.05% | 0.38% | +0.33% |
| 2 | 2026-06-08 | 0.03% | 0.05% | +0.02% |
| 3 | 2026-05-08 | — | 0.03% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.6 | 3.1 | HIGH |
|
3.9 | 4.0 | [email protected] |
GHSA-2jf5-6wwv-vhxx · Severity: high · Ecosystem: npm — Inngest TypeScript SDK exposes environment variables via serve() handler on unhandled HTTP methods
| URL | Tags |
|---|---|
| https://github.com/inngest/inngest-js/releases/tag/inngest%403.54.1 | Patch Product |
| https://github.com/inngest/inngest-js/security/advisories/GHSA-2jf5-6wwv-vhxx | Mitigation Vendor Advisory |