CVE-2026-55884 Tilt: Missing authentication on the network-exposed Tilt HUD server
Unauthenticated attackers can access the Tilt HUD server to execute code, read sensitive state, and modify configurations when bound to non-loopback addresses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55884?
CVE-2026-55884 is a critical missing authorization vulnerability in tilt-dev tilt, published on 10 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Tilt defines dev environments as code for microservice apps on Kubernetes. From 0.20.8 through 0.37.3, the Tilt HUD HTTP server registers handlers on a gorilla/mux router with no authenticating middleware. When the HUD is bound to a non-loopback address, an unauthenticated network caller can trigger developer-defined resources, tamper with Tiltfile arguments, read full engine state including the session token, and invoke apiserver resources through the token-attaching /proxy handler. This issue is fixed in version 0.37.4.
Weakness: CWE-306
Which versions are affected by CVE-2026-55884?
3 open source packages ship an affected version, including github.com/tilt-dev/tilt.
| Package | Affected | Fixed in |
|---|---|---|
github.com/tilt-dev/tilt Go | From 0.20.8 | 0.37.4 |
github.com/tilt-dev/tilt Go | From 0.20.8 | 0.37.4 |
github.com/tilt-dev/tilt Go | From 0.20.8 | 0.37.4 |
How do I fix CVE-2026-55884?
Upgrade github.com/tilt-dev/tilt to 0.37.4 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-55884 being exploited?
There is no known exploitation of CVE-2026-55884 in the wild and no public exploit code.
Sources
Also known as GHSA-c73q-8xxr-rgqm, GO-2026-5317.