CVE-2026-55883 json
Tilt: Cross-site WebSocket hijacking of the Tilt HUD stream
published 2026-06-19 4 mo ago modified 2026-10-25 14 d ago also GHSA-6m68-r693-78qx , GO-2026-5181 , EUVD-2026-43112
- cvss
- 8.3
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
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.
Patch / fix
- go github.com/tilt-dev/tilt 0.37.4
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
- github.com/tilt-dev/tilt@47393fb commit
- github.com/tilt-dev/tilt#6776 pull request
- github.com/tilt-dev/tilt/releases/tag/v0.37.4 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.3 | 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 |
| CNA | 4.0 | 8.3 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/tilt-dev/tilt | >=0.24.0, <0.37.4 |
0.37.4 |
Affected products
- tilt-dev tilt
Classification
- Weakness
-
- CWE-345 Insufficient Verification of Data Authenticity
References
-
github.com
/tilt-dev/tilt/pull/6776
web, patch
-
github.com
/tilt-dev/tilt/commit/47393fba7f6ef5e305d5e814551feef8e4acbc0a
web
-
github.com
/tilt-dev/tilt/security/advisories/GHSA-6m68-r693-78qx
web, advisory
-
github.com
/tilt-dev/tilt/releases/tag/v0.37.4
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-55883
advisory
-
github.com
/tilt-dev/tilt
package
Sources
- CVE List CVE-2026-55883
- GitHub Advisory GHSA-6m68-r693-78qx
- NVD CVE-2026-55883
- OSV GO-2026-5181
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.