{"id":"GHSA-c73q-8xxr-rgqm","summary":"Tilt: Missing authentication on the network-exposed Tilt HUD server","details":"## Summary\nThe Tilt HUD HTTP server exposes state-changing and sensitive-read endpoints with no authentication. When the HUD is bound to a non-loopback address, a network attacker can trigger the developer's pre-defined Tiltfile resources, tamper with Tiltfile arguments, read full engine state including the session token, and reach the Tilt apiserver through a token-attaching proxy.\n\n## Details\nThe HUD server registers its handlers on a `gorilla/mux` router with no authenticating middleware. The `cookieWrapper` helper emits the `Tilt-Token` cookie but never validates it, and is attached only to the static-asset prefix.\n\n## Impact\nAn unauthenticated network caller can force any developer-defined resource to run on the host as the `tilt` user (choosing which and when, not the command text), set arbitrary Tiltfile arguments, disclose the session token and full engine state, and invoke apiserver resources via the loopback-token proxy. Because `tilt up` runs with the developer's privileges and credentials, the impact reaches the developer's environment and cluster.\n\n### Conditions for exploitation\n- Affected version in `\u003e= 0.20.8, \u003c= 0.37.3`.\n- HUD bound to a non-loopback address (`tilt up --host 0.0.0.0`, or `TILT_HOST` set).\n- Network reachability to the listener (default port `10350`).\n\n### Not affected\n- The default loopback-only bind is not reachable from the network.\n\n## Workarounds\nUse the default loopback bind (omit `--host`, unset `TILT_HOST`) and ensure nothing else proxies to `localhost:10350`. No complete workaround short of upgrading for non-loopback deployments.","aliases":["CVE-2026-55884","GO-2026-5317"],"modified":"2026-06-25T19:56:17.819238468Z","published":"2026-06-19T13:58:13Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-06-19T13:58:13Z","nvd_published_at":null,"cwe_ids":["CWE-306"],"severity":"CRITICAL"},"references":[{"type":"WEB","url":"https://github.com/tilt-dev/tilt/security/advisories/GHSA-c73q-8xxr-rgqm"},{"type":"WEB","url":"https://github.com/tilt-dev/tilt/pull/6776"},{"type":"PACKAGE","url":"https://github.com/tilt-dev/tilt"},{"type":"WEB","url":"https://github.com/tilt-dev/tilt/releases/tag/v0.37.4"}],"affected":[{"package":{"name":"github.com/tilt-dev/tilt","ecosystem":"Go","purl":"pkg:golang/github.com/tilt-dev/tilt"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.20.8"},{"fixed":"0.37.4"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-c73q-8xxr-rgqm/GHSA-c73q-8xxr-rgqm.json","last_known_affected_version_range":"\u003c= 0.37.3"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}