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TI-2026-40336 Aliases CVE-2026-55883GHSA-6m68-r693-78qx

Tilt: Cross-site WebSocket hijacking of the Tilt HUD stream

Priority LOW 36CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-345.

Summary

Tilt defines dev environments as code for microservice apps on Kubernetes. From 0.24.0 through 0.37.3, the Tilt HUD WebSocket at /ws/view is gated by a CSRF token, but the token is served by the unauthenticated /api/websocket_token endpoint and the upgrader accepts clients that omit an Origin header. When the HUD is network-exposed, an attacker who can reach the listener can open the HUD WebSocket and receive the full view stream, including session state, Tiltfile contents, resource statuses, and continued updates. This issue is fixed in version 0.37.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00262 18th percentileScored 2026-11-07
Fix Fixed tilt (tilt-dev): 0.37.4github.com/tilt-dev/tilt (Go): 0.37.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
tilt-devtilt0.24.0 to before 0.37.40.37.4Patch availableCNA
—github.com/tilt-dev/tilt (Go)0.24.0 to before 0.37.40.37.4Patch availableGHSA-6m68-r693-78qx
  • tilt Vendortilt-dev Affected 0.24.0 to before 0.37.4 Fixed in 0.37.4 Patch available CNA
  • github.com/tilt-dev/tilt (Go) Vendor— Affected 0.24.0 to before 0.37.4 Fixed in 0.37.4 Patch available GHSA-6m68-r693-78qx

Remediation

  • Fix · CNA tilt (tilt-dev) Fixed in 0.37.4
  • Fix · GHSA-6m68-r693-78qx github.com/tilt-dev/tilt (Go) Fixed in 0.37.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55883
  2. 2026-10-03 Alias added: GHSA-6m68-r693-78qx

References

Advisory 1

Other 5

  • TI-2026-40337 Tilt: Missing authentication on the network-exposed Tilt HUD server CVSS 4.0CRITICAL 9.2
  • TI-2026-40335 Tilt: Unauthenticated pprof debug endpoints on the Tilt HUD server CVSS 4.0HIGH 8.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences