{"schemaVersion":3,"id":"CVE-2026-111058","aliases":["GHSA-rv4m-xm3f-3ccq"],"status":"published","duplicateOf":null,"title":null,"description":"Mercury is a Python framework for sharing Jupyter notebooks as web applications and dashboards. Prior to 3.2.6, default tokenless deployments allow anonymous clients to create Jupyter kernels and send execute_request messages containing arbitrary Python. The endpoint blocklist does not cover /api/kernels, and the websocket wrapper previously tracked idle activity without authorizing executable messages. This issue is fixed in version 3.2.6.","dates":{"published":"2026-10-19T16:06:22.646Z","modified":"2026-10-19T17:06:53.899Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true}]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-862","name":"Missing Authorization","description":"The product does not perform an authorization check when an actor attempts to access a resource or perform an action.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/862.html"}],"affected":[{"vendor":"mljar","product":"mercury","name":"mercury","label":"mercury","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.2.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.2.6","eol":null,"hubHref":"/vendor/mljar/mercury"},{"vendor":"PyPI","product":"mercury","name":"mercury","label":"mercury","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/mercury","purlType":"pypi","versions":[{"text":"< 3.2.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.2.6","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/mljar/mercury/security/advisories/GHSA-rv4m-xm3f-3ccq","label":"github.com/mljar/mercury/security/advisories/GHSA-rv4m-xm3f-3ccq","hostname":"github.com","tags":["X Refsource CONFIRM","WEB"]},{"url":"https://github.com/mljar/mercury/commit/73a40ceb0becf057f495a5738ad7f5a5222a53e1","label":"github.com/mljar/mercury/commit/73a40ceb0becf057f495a5738ad7f5a5222a53e1","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/mljar/mercury/releases/tag/3.2.6","label":"github.com/mljar/mercury/releases/tag/3.2.6","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/mljar/mercury","label":"github.com/mljar/mercury","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-19T16:06:22.646Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-19T17:06:53.899Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T12:26:07.153Z","stale":false,"partial":false}}