{"items":[{"id":"NVI-00015350","kind":"vulnerability","title":"Open WebUI's Insecure Message Access Breaks Authorization","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-jxwr-g6r6-j3fx","CVE-2026-44569"],"plain_summary":"GitHub lists this reviewed advisory for open-webui. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-5e1415af3cf7564339e5c5d4d3f84d1e"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-03T12:03:24.000Z","value":"7.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-5e1415af3cf7564339e5c5d4d3f84d1e"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-5e1415af3cf7564339e5c5d4d3f84d1e","url":"https://github.com/advisories/GHSA-jxwr-g6r6-j3fx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-jxwr-g6r6-j3fx","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:58:33.950Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-5e1415af3cf7564339e5c5d4d3f84d1e"],"technology":"open-webui","known_exclusions":[],"conditions_summary":"### Description\n\nThere's an IDOR in the channels message management system that allows authenticated users to modify or delete any message within channels they have read access to. The vulnerability exists in the message update and delete endpoints, which implement channel-level authorization but completely lack message ownership validation.\n\nWhile the frontend correctly implements ownership checks (showing edit/delete buttons only for message owners or admins), the backend APIs bypass these protections by only validating channel access permissions without verifying that the requesting user owns the target message. This creates a client-side security control bypass where attackers can directly call the APIs to modify other users' messages.\n\nThe vulnerability affects both message content modification and deletion, allowing users to tamper with message integrity and audit trails in collaborative channel environments.\n\n### Source - Sink Analysis\n\n**Source:** User-controlled `message_id` parameter in URL path\n\n**Call Chain:**\n1. FastAPI route handlers `update_message_by_id()` (line 450) and `delete_message_by_id()` (line 630) in `backend/open_webui/routers/channels.py`\n2. Channel-level","public_affected_ranges":["<= 0.6.18"]}],"null_published_at":"2026-11-03T10:03:31.350Z","source_updated_at":"2026-08-03T12:03:24.000Z","source_disclosed_at":"2026-05-11T14:04:35.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T09:58:33.950Z"}],"next_cursor":null,"snapshot_revision":"42594"}