CVE-2026-55571: high-severity vulnerability in djust-org djust
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
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.5%
djust provides Phoenix LiveView-style reactive server-side rendering for Django with Rust-powered performance. Prior to 1.0.4, LiveViewConsumer.handle_mount sends a `{"type":"navigate","to":...}` frame when login_required, permission_required, or a redirecting on_mount hook denies a LiveView mount, but returns without closing the WebSocket or clearing self.view_instance. A browser follows the redirect, but a raw WebSocket client can ignore it and retain the mounted socket. Because LiveViewConsumer.handle_event does not recheck authentication or authorization, the client can send `{"type":"event",...}` frames that invoke @event_handler methods without an authenticated session, including through handle_live_redirect_mount, enabling unauthorized sensitive reads or mutations. This issue is fixed in version 1.0.4.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Affected products
djust-org · djustRelated CVEs — djust-org djust
In the same product, most dangerous first.
CVE-2026-61599HIGHdjust has an unauthenticated arbitrary module import via the WebSocket/SSE view-mount pathEPSS 0.6%CVE-2026-61594CRITICALdjust has an authorization bypass on the WebSocket/SSE mount pathEPSS 0.5%CVE-2026-61598HIGHClient mass-assignment of arbitrary view attributes via the default dj-model update_model handlerEPSS 0.4%CVE-2026-61597MEDIUMdjust is vulnerable to stored/reflected XSS via javascript: URLs in built-in component template tagsEPSS 0.4%CVE-2026-61592HIGHdjust: SSE sessions are not bound to the authenticated user; the client-chosen session_id is the sole authorization capability (session hijack)EPSS 0.4%CVE-2026-61588MEDIUMdjust's Django model serialization has no sensitive-field denylist: password hashes, privilege flags, and PII on a public view attribute are sent to the clientEPSS 0.4%