{"items":[{"id":"NVI-00010674","kind":"vulnerability","title":"Jupyter Server: Gateway WebSocket handler bypasses kernel execute authorization","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-354v-3q48-cv69","CVE-2026-114135"],"plain_summary":"GitHub lists this reviewed advisory for jupyter-server. 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-0005e52bee062766e6985152f9fa0561"],"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":"2026-10-22T15:46:32.000Z","value":"8.8 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-9873798e2d381553ace9194708bcea0b"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.484%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.41702. Missing scores are unknown.","source_id":"sr-0005e52bee062766e6985152f9fa0561"}],"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-9873798e2d381553ace9194708bcea0b","url":"https://github.com/advisories/GHSA-354v-3q48-cv69","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-354v-3q48-cv69","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"},{"id":"sr-0005e52bee062766e6985152f9fa0561","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-114135","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:15:58.841Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-9873798e2d381553ace9194708bcea0b"],"technology":"jupyter-server","known_exclusions":[],"conditions_summary":"### Summary\n\nJupyter Server's gateway WebSocket handler checks that a user is authenticated, but it does not ask the configured Authorizer whether that user may execute kernels.\n\nIn Jupyter Server 2.0.0 through 2.5.0, enabling GatewayClient.url automatically replaced the normal kernel channel handler with this gateway-specific handler. An authenticated user who is denied the `execute` action on the `kernels` resource can therefore still open a kernel channel and send messages to the upstream kernel.\n\n### Details\n\nThe normal handler performs the expected authorization check before creating the WebSocket connection:\n\nhttps://github.com/jupyter-server/jupyter_server/blob/v2.5.0/jupyter_server/services/kernels/websocket.py#L39-L47\n\nThe gateway handler only checks `current_user` and then opens the upstream channel. It never calls `authorizer.is_authorized(...)`:\n\nhttps://github.com/jupyter-server/jupyter_server/blob/v2.5.0/jupyter_server/gateway/handlers.py#L49-L75\nhttps://github.com/jupyter-server/jupyter_server/blob/v2.5.0/jupyter_server/gateway/handlers.py#L87-L98\n\nGateway mode selected that handler automatically by replacing handlers with matching routes:\n\nhttps://github.com/jupyter","public_affected_ranges":[">= 2.0.0, < 2.6.0"]}],"null_published_at":"2026-11-03T17:49:14.958Z","source_updated_at":"2026-10-22T15:46:32.000Z","source_disclosed_at":"2026-10-22T15:46:31.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T22:07:30.906Z"},{"id":"NVI-00010674","kind":"vulnerability","title":"Jupyter Server: Gateway WebSocket handler bypasses kernel execute authorization","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-354v-3q48-cv69","CVE-2026-114135"],"plain_summary":"GitHub lists this reviewed advisory for jupyter-server. 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-9873798e2d381553ace9194708bcea0b"],"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":"2026-10-22T15:46:32.000Z","value":"8.8 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-9873798e2d381553ace9194708bcea0b"}],"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-9873798e2d381553ace9194708bcea0b","url":"https://github.com/advisories/GHSA-354v-3q48-cv69","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-354v-3q48-cv69","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-9873798e2d381553ace9194708bcea0b"],"technology":"jupyter-server","known_exclusions":[],"conditions_summary":"### Summary\n\nJupyter Server's gateway WebSocket handler checks that a user is authenticated, but it does not ask the configured Authorizer whether that user may execute kernels.\n\nIn Jupyter Server 2.0.0 through 2.5.0, enabling GatewayClient.url automatically replaced the normal kernel channel handler with this gateway-specific handler. An authenticated user who is denied the `execute` action on the `kernels` resource can therefore still open a kernel channel and send messages to the upstream kernel.\n\n### Details\n\nThe normal handler performs the expected authorization check before creating the WebSocket connection:\n\nhttps://github.com/jupyter-server/jupyter_server/blob/v2.5.0/jupyter_server/services/kernels/websocket.py#L39-L47\n\nThe gateway handler only checks `current_user` and then opens the upstream channel. It never calls `authorizer.is_authorized(...)`:\n\nhttps://github.com/jupyter-server/jupyter_server/blob/v2.5.0/jupyter_server/gateway/handlers.py#L49-L75\nhttps://github.com/jupyter-server/jupyter_server/blob/v2.5.0/jupyter_server/gateway/handlers.py#L87-L98\n\nGateway mode selected that handler automatically by replacing handlers with matching routes:\n\nhttps://github.com/jupyter","public_affected_ranges":[">= 2.0.0, < 2.6.0"]}],"null_published_at":"2026-10-31T22:27:09.628Z","source_updated_at":"2026-10-22T15:46:32.000Z","source_disclosed_at":"2026-10-22T15:46:31.000Z","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":"2026-10-31T22:07:30.906Z"}],"next_cursor":null,"snapshot_revision":"42594"}