Vulnerabilities in pkg:golang/github.com/tilt-dev/tilt

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6m68-r693-78qx",
  "modified" : "2026-07-21T13:44:52Z",
  "published" : "2026-06-19T13:53:35Z",
  "aliases" : [ "CVE-2026-55883" ],
  "summary" : "Tilt: Cross-site WebSocket hijacking of the Tilt HUD stream",
  "details" : "## Summary\nThe Tilt HUD WebSocket (`/ws/view`) is gated by a CSRF token, but the token is served by an unauthenticated endpoint and the upgrader accepts any client that omits an `Origin` header. When the HUD is network-exposed, an attacker can open the HUD stream and read the developer's session state.\n\n## Details\nThe upgrader accepts a connection when the `csrf` query parameter matches a process-wide token (`websocketCSRFToken`). That token is served as `text/plain` by an unauthenticated handler (`WebsocketToken`, mounted at `/api/websocket_token`), so any reachable caller can fetch it and connect to `/ws/view?csrf=<token>`. When the parameter does not match, the upgrader falls back to a same-origin check that returns true when the `Origin` header is absent, so a non-browser client that omits `Origin` is accepted anyway. The token has no per-session binding.\n\n## Impact\nAn attacker who can reach the HUD listener can open the HUD WebSocket and receive the full view stream — session state, Tiltfile contents, resource statuses, and continued updates — defeating the intended anti-CSWSH protection.\n\n### Conditions for exploitation\n- Affected version in `>= 0.24.0, <= 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`). No complete workaround short of upgrading for non-loopback deployments.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/tilt-dev/tilt"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.24.0"
      }, {
        "fixed" : "0.37.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.37.3"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/tilt-dev/tilt/security/advisories/GHSA-6m68-r693-78qx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-55883"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tilt-dev/tilt/pull/6776"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tilt-dev/tilt/commit/47393fba7f6ef5e305d5e814551feef8e4acbc0a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/tilt-dev/tilt"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tilt-dev/tilt/releases/tag/v0.37.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-345" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-19T13:53:35Z",
    "nvd_published_at" : "2026-07-10T22:16:44Z"
  }
}