CVE-2026-114139 Sentry-Javascript: Middleware Bypass when using Tunnel route
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114139?
CVE-2026-114139 is a critical vulnerability in getsentry sentry-javascript, published on 21 Oct 2026.
Official description
Sentry-Javascript is an official Sentry SDKs for JavaScript. From 9.36.0 until 9.47.2, 10.75.2, and 11.0.0-rc.1, the webpack integration for @sentry/nextjs skips application middleware for every request path under a configured tunnelRoute, while the tunnel rewrite serves only the exact tunnel path with valid o and p query parameters. When an application route directly collides with the tunnel path or a root dynamic segment resolves under it, an unauthenticated request can reach that route without middleware authorization. Exploitation requires tunnelRoute, a webpack build, a colliding route, and middleware being the only authorization control. This issue is fixed in versions 9.47.2, 10.75.2, and 11.0.0-rc.1.
Weakness: CWE-693
Which versions are affected by CVE-2026-114139?
6 open source packages ship an affected version, including @sentry/nextjs.
| Package | Affected | Fixed in |
|---|---|---|
@sentry/nextjs npm | From 10.0.0-alpha.0 | 10.75.2 |
@sentry/nextjs npm | From 10.0.0-alpha.0 | 10.75.2 |
@sentry/nextjs npm | From 11.0.0-alpha.0 | 11.0.0-rc.1 |
@sentry/nextjs npm | From 11.0.0-alpha.0 | 11.0.0-rc.1 |
@sentry/nextjs npm | From 9.36.0 | 9.47.2 |
@sentry/nextjs npm | From 9.36.0 | 9.47.2 |
How do I fix CVE-2026-114139?
Upgrade @sentry/nextjs to a fixed version for your release line: 10.75.2, 11.0.0-rc.1 or 9.47.2.
Is CVE-2026-114139 being exploited?
There is no known exploitation of CVE-2026-114139 in the wild and no public exploit code.
Sources
Also known as ECHO-bc46-68ba-ff1a, GHSA-mchm-gjx6-7h55.