Sign in
Deutsch English Español Polski
Medium

djust: WebSocket/runtime reconstructed request omits the client Host, causing host/subdomain TenantResolvers to misresolve the tenant on the live path

  • Disclosed: 16.09.2026
  • Updated: 11.10.2026 15:18

Impact

The WebSocket handle_mount and ViewRuntime._build_request rebuild an HttpRequest via RequestFactory().get(...) with no HTTP_HOST, so request.get_host() defaulted to "testserver" on the live path. Host/subdomain/domain TenantResolvers then misresolved the tenant — None on the live path while the HTTP path resolved correctly. With STRICT_MODE=False the tenant-scoped managers returned unscoped rows (cross-tenant disclosure); with the default they returned an empty queryset (broken tenancy).

Patches

Fixed in djust 1.0.7. The handshake Host is extracted from the ASGI scope, validated against ALLOWED_HOSTS (the same logic as the CSWSH Origin gate, parsed with Django's split_domain_port so malformed Hosts are rejected at the boundary), and propagated — with the TLS scheme — into the reconstructed request, so live-path tenant resolution matches HTTP exactly.

Workarounds

No workaround on the live path short of upgrading. Most exposed when combined with STRICT_MODE=False.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Python (PyPI) djust < 1.0.7 1.0.7

References

CVSS score 6.3/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE)
CWE-348, CWE-639
Platform
Python (PyPI)
Package
djust
Disclosed
16.09.2026
Updated
11.10.2026 15:18

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-4046 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-v9rj-xjfv-xj9r - CC BY 4.0

Vulnerability history: djust

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (15) in the archive
Total entries
15
First → latest
08.2026 09.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 11
  • Medium 3

Disclosures per year

Severity:
  1. djust: A template binding inherits a context safety grant it never earned (XSS)
    High ghsa-xjw9-38cr-6372 < 1.1.2 1.1.2
  2. djust: Six template-layer defects emit attacker-controlled markup unescaped (XSS)
    High ghsa-9395-2g46-rj3f < 1.1.1 1.1.1
  3. djust has an unauthenticated arbitrary module import via the WebSocket/SSE view-mount path
    High CVE-2026-61599 < 1.0.7 1.0.7
  4. djust: WebSocket/runtime reconstructed request omits the client Host, causing host/subdomain TenantResolvers to misresolve the tenant on the live path this entry
    Medium · 6.3 CVE-2026-61589 < 1.0.7 1.0.7
  5. djust has broken object-level access control (IDOR)
    High · 7.1 CVE-2026-61596 < 1.0.7 1.0.7
  6. djust has an authorization bypass on the WebSocket/SSE mount path
    Critical · 9.1 CVE-2026-61594 < 1.0.7 1.0.7
  7. djust: Unsigned client state snapshot is restored as trusted view state (privilege escalation / state injection)
    High · 8.1 CVE-2026-61591 < 1.0.7 1.0.7
  8. djust: SSE sessions are not bound to the authenticated user; the client-chosen session_id is the sole authorization capability (session hijack)
    High · 7.4 CVE-2026-61592 < 1.0.7 1.0.7
  9. djust has Cross-Site Request Forgery on the Server-Sent-Events transport: a cross-origin page can drive a victim-authenticated SSE session
    High · 8.1 CVE-2026-61593 < 1.0.7 1.0.7
  10. djust: Multi-tenant isolation fails open on the WebSocket/SSE path, disclosing other tenants' data
    High · 7.7 CVE-2026-61595 < 1.0.7 1.0.7
  11. djust: Client mass-assignment of arbitrary view attributes via the default dj-model update_model handler
    High CVE-2026-61598 < 1.0.7 1.0.7
  12. djust's observability endpoints are network-exposed: the localhost gate is an opt-in middleware the docs omit, and the views enforce only DEBUG
    High · 7.4 CVE-2026-61590 < 1.0.7 1.0.7
  13. djust authentication bypass: a login_required / on_mount LiveView mount redirect does not close the WebSocket, allowing an unauthenticated client to dispatch event-handler calls
    High · 8.2 CVE-2026-55571 < 1.0.4 1.0.4

Know which vulnerabilities affect your application

With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.

Connect your application
DockRay newsletter

Application security in your inbox

Important vulnerabilities, actionable guidance and practical advice for your applications. Choose your technologies and follow what matters to your project.

  • A daily digest of new vulnerabilities, critical ones included.
  • Notifications about important updates.
  • Practical advice on application security and monitoring.

Leave empty to receive updates for every technology.

Privacy policy

Free to subscribe. Unsubscribe with one click in any email.