{"id":"CVE-2026-111058","state":"PUBLISHED","title":"Mercury: Unauthenticated Remote Code Execution via /api/kernels","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.","publishedAt":"2026-10-19T16:06:22.646Z","updatedAt":"2026-10-19T17:06:53.899Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["mljar mercury"],"affected":[{"vendor":"mljar","product":"mercury","versions":[{"version":"< 3.2.6","status":"affected"}]}],"references":["https://github.com/mljar/mercury/security/advisories/GHSA-rv4m-xm3f-3ccq","https://github.com/mljar/mercury/commit/73a40ceb0becf057f495a5738ad7f5a5222a53e1","https://github.com/mljar/mercury/releases/tag/3.2.6"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/111xxx/CVE-2026-111058.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-111058","state":"PUBLISHED","datePublished":"2026-10-19T16:06:22.646Z","dateUpdated":"2026-10-19T17:06:53.899Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-15T12:47:13.664Z"},"containers":{"cna":{"title":"Mercury: Unauthenticated Remote Code Execution via /api/kernels","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"mljar","product":"mercury","versions":[{"version":"< 3.2.6","status":"affected"}]}],"references":[{"url":"https://github.com/mljar/mercury/security/advisories/GHSA-rv4m-xm3f-3ccq","name":"https://github.com/mljar/mercury/security/advisories/GHSA-rv4m-xm3f-3ccq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/mljar/mercury/commit/73a40ceb0becf057f495a5738ad7f5a5222a53e1","name":"https://github.com/mljar/mercury/commit/73a40ceb0becf057f495a5738ad7f5a5222a53e1","tags":["x_refsource_MISC"]},{"url":"https://github.com/mljar/mercury/releases/tag/3.2.6","name":"https://github.com/mljar/mercury/releases/tag/3.2.6","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-19T16:06:22.646Z"},"source":{"advisory":"GHSA-rv4m-xm3f-3ccq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-19T17:05:16.440516Z","id":"CVE-2026-111058","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T17:06:53.899Z"}}]}}}