# CVE-2026-55884: Tilt HUD missing authentication in HTTP server

Source: https://junglewise.ai/threats/cve-2026-55884-tilt-hud-missing-authentication-in-http-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-10. Updated: 2026-07-10  
License: CC BY 4.0 with a link back

CVE-2026-55884 · Severity: critical · CVSS 4 · Published 2026-07-10

Tilt, a tool used by developers to manage microservice environments on Kubernetes, contains a security vulnerability in its dashboard (HUD) server. When the dashboard is configured to be accessible over a network rather than just the local machine, it fails to verify the identity of users. This allows an unauthorized person on the same network to view sensitive configuration files, modify development settings, and potentially gain control over the connected Kubernetes resources.

Technologies: [github.com/tilt-dev/tilt (Go)](https://junglewise.ai/threats/technologies/github-com-tilt-dev-tilt), [Tilt](https://junglewise.ai/threats/technologies/tilt). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Tilt](https://junglewise.ai/threats/vendors/tilt).

## Quick answers

**Is CVE-2026-55884 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-55884 being exploited in the wild.

**How severe is CVE-2026-55884?** Critical severity, with a CVSS score of 4, published 10 July 2026.

**Which products and versions are affected?** github.com/tilt-dev/tilt (Go) >= 0.20.8, <= 0.37.3, SEMVER:introduced=0.20.8,fixed=0.37.4; Tilt >= 0.20.8, <= 0.37.3, 0.20.8 through 0.37.3.

**Is there a fix for CVE-2026-55884?** Yes. github.com/tilt-dev/tilt (Go): upgrade to 0.37.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-55884 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-55884?** Check whether you run github.com/tilt-dev/tilt (Go) or Tilt at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/tilt-dev/tilt (Go): upgrade to 0.37.4 or later

  ```sh
  go get github.com/tilt-dev/tilt@v0.37.4
  ```


## Technical details

The Tilt HUD HTTP server, which utilizes a gorilla/mux router, was found to register several sensitive handlers without authenticating middleware. When the server is bound to a non-loopback address (e.g., via the --host 0.0.0.0 flag), an unauthenticated remote attacker can access endpoints such as /api/view, /api/trigger, and /proxy/*. This allows for the extraction of the full engine state (including session tokens), tampering with Tiltfile arguments, and the invocation of Kubernetes apiserver resources through the token-attaching proxy handler. The vulnerability also included a WebSocket origin check bypass where omitting the Origin header allowed unauthorized access to the full view stream. The issue is resolved in version 0.37.4 by implementing CSRF protection, SameSite=Strict cookies, and mandatory token authentication for sensitive endpoints.

## Affected products

- tilt-dev Tilt 0.20.8 through 0.37.3

## Identifiers

- CVE-2026-55884
- GHSA-c73q-8xxr-rgqm
- GO-2026-5317

## Timeline

- 2026-06-15: patched: Fixes merged into master branch
- 2026-06-16: advisory: Release v0.37.4 published
- 2026-07-10: disclosed: CVE published to NVD

## References

- [https://github.com/tilt-dev/tilt/commit/47393fba7f6ef5e305d5e814551feef8e4acbc0a](https://github.com/tilt-dev/tilt/commit/47393fba7f6ef5e305d5e814551feef8e4acbc0a)
- [https://github.com/tilt-dev/tilt/pull/6776](https://github.com/tilt-dev/tilt/pull/6776)
- [https://github.com/tilt-dev/tilt/releases/tag/v0.37.4](https://github.com/tilt-dev/tilt/releases/tag/v0.37.4)
- [https://github.com/tilt-dev/tilt/security/advisories/GHSA-c73q-8xxr-rgqm](https://github.com/tilt-dev/tilt/security/advisories/GHSA-c73q-8xxr-rgqm)

## Related threats

- [Tilt Cross-site WebSocket Hijacking in HUD interface](https://junglewise.ai/threats/cve-2026-55883-tilt-cross-site-websocket-hijacking-in-hud-interface)
- [tilt-dev Tilt unauthenticated pprof debug endpoints in HUD server](https://junglewise.ai/threats/cve-2026-55882-tilt-dev-tilt-unauthenticated-pprof-debug-endpoints-in-hud-server)