{"id":"CVE-2026-55571","state":"PUBLISHED","title":"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","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.","publishedAt":"2026-08-25T16:05:49.069Z","updatedAt":"2026-08-25T17:56:03.253Z","severity":{"score":8.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["djust-org djust"],"affected":[{"vendor":"djust-org","product":"djust","versions":[{"version":"< 1.0.4","status":"affected"}]}],"references":["https://github.com/djust-org/djust/security/advisories/GHSA-xx4j-w367-7247","https://github.com/djust-org/djust/pull/1780","https://github.com/djust-org/djust/commit/1ae8aa9246b80477de7ddc4d90319a3b267bef04","https://github.com/djust-org/djust/releases/tag/v1.0.4"],"weaknesses":["CWE-285","CWE-306"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55571.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55571","state":"PUBLISHED","datePublished":"2026-08-25T16:05:49.069Z","dateUpdated":"2026-08-25T17:56:03.253Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T23:11:20.214Z"},"containers":{"cna":{"title":"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","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"djust-org","product":"djust","versions":[{"version":"< 1.0.4","status":"affected"}]}],"references":[{"url":"https://github.com/djust-org/djust/security/advisories/GHSA-xx4j-w367-7247","name":"https://github.com/djust-org/djust/security/advisories/GHSA-xx4j-w367-7247","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/djust-org/djust/pull/1780","name":"https://github.com/djust-org/djust/pull/1780","tags":["x_refsource_MISC"]},{"url":"https://github.com/djust-org/djust/commit/1ae8aa9246b80477de7ddc4d90319a3b267bef04","name":"https://github.com/djust-org/djust/commit/1ae8aa9246b80477de7ddc4d90319a3b267bef04","tags":["x_refsource_MISC"]},{"url":"https://github.com/djust-org/djust/releases/tag/v1.0.4","name":"https://github.com/djust-org/djust/releases/tag/v1.0.4","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-285","lang":"en","description":"CWE-285: Improper Authorization","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-306","lang":"en","description":"CWE-306: Missing Authentication for Critical Function","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-25T16:05:49.069Z"},"source":{"advisory":"GHSA-xx4j-w367-7247","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/djust-org/djust/security/advisories/GHSA-xx4j-w367-7247","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-25T17:53:50.399545Z","id":"CVE-2026-55571","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-25T17:56:03.253Z"}}]}}}