Missing Authentication for Critical Function Affecting djust package, versions [,1.0.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-DJUST-20158900
- published27 Sept 2026
- disclosed25 Aug 2026
- creditUnknown
Introduced: 25 Aug 2026
CVE-2026-55571 (opens in a new tab)How to fix?
Upgrade djust to version 1.0.4 or higher.
Overview
djust is a Phoenix LiveView-style reactive components for Django with Rust-powered performance. Real-time UI updates over WebSocket, no JavaScript build step required.
Affected versions of this package are vulnerable to Missing Authentication for Critical Function through the handle_event process. An attacker can execute unauthorized event handler methods by maintaining an open WebSocket connection after receiving a redirect frame, thereby bypassing authentication and authorization checks. This is only exploitable if a non-browser WebSocket client is used and the attacker knows or can enumerate the view path and event names.
Workaround
This vulnerability can be mitigated by ensuring every event handler on a gated LiveView independently verifies the request user is authenticated and authorized, or by overriding the consumer's handle_mount to close the connection after emitting an auth redirect.