---
title: "CVE-2026-55884: Tilt: Missing authentication on the network-exposed Tilt HUD server"
url: https://erroneo.us/security/cve/CVE-2026-55884/
description: "CVE-2026-55884 (github.com/tilt-dev/tilt (Go)): Tilt defines dev environments as code for microservice apps on Kubernetes. From 0.20.8 through 0.37.3, the…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-07-10
date_modified: 2026-07-29
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-55884"
kev: false
cvss: 9.2
epss: 0.00496
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-55884: Tilt: Missing authentication on the network-exposed Tilt HUD server

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.5% , percentile 42: FIRST’s model estimates a 0.5% chance of exploitation activity in the next 30 days, higher than 42% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/tilt-dev/tilt (Go) >= 0.20.8, <= 0.37.3, fixed in 0.37.4 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- Go `github.com/tilt-dev/tilt` >= 0.20.8, <= 0.37.3 → fixed: 0.37.4

## Affected products (CVE record)

- tilt-dev tilt: >= 0.20.8, < 0.37.4

## Severity

- GitHub_M CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N`
- GitHub CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.50% probability of exploitation activity in the next 30 days; percentile 42.

## Sources

- [GitHub Advisory GHSA-c73q-8xxr-rgqm](https://github.com/advisories/GHSA-c73q-8xxr-rgqm)
- [CVE.org record CVE-2026-55884](https://www.cve.org/CVERecord?id=CVE-2026-55884)
- [NVD entry CVE-2026-55884](https://nvd.nist.gov/vuln/detail/CVE-2026-55884)
- [github.com](https://github.com/tilt-dev/tilt/security/advisories/GHSA-c73q-8xxr-rgqm)
- [github.com](https://github.com/tilt-dev/tilt/pull/6776)
- [github.com](https://github.com/tilt-dev/tilt/commit/47393fba7f6ef5e305d5e814551feef8e4acbc0a)
- [github.com](https://github.com/tilt-dev/tilt/releases/tag/v0.37.4)

---
Source page: https://erroneo.us/security/cve/CVE-2026-55884/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt