High severity · published Aug 25, 2026
CVE-2026-55571
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
8.2
CVSS
0.5%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DJ
djust · djust-org
< 1.0.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55571
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55571
github.com
https://github.com/djust-org/djust/commit/1ae8aa9246b80477de7ddc4d90319a3b267bef04
github.com
https://github.com/djust-org/djust/pull/1780
github.com
https://github.com/djust-org/djust/releases/tag/v1.0.4
github.com
https://github.com/djust-org/djust/security/advisories/GHSA-xx4j-w367-7247
More from djust
9.1
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8.8
CVE-2026-61599
djust has an unauthenticated arbitrary module import via the WebSocket/SSE view-mount path
8.1
CVE-2026-61591
djust: Unsigned client state snapshot is restored as trusted view state (privilege escalation / state injection)
8.1
CVE-2026-61593
djust has Cross-Site Request Forgery on the Server-Sent-Events transport: a cross-origin page can drive a victim-authenticated SSE session
7.7
CVE-2026-61595
djust: Multi-tenant isolation fails open on the WebSocket/SSE path, disclosing other tenants' data
