{"id":"CVE-2026-111058","title":"Mercury: Unauthenticated Remote Code Execution via /api/kernels","summary":"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 …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-862"],"vendor":"mljar","product":"mercury","affected":["mercury < 3.2.6"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-19T17:05:16.440516Z"},"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T17:06:53.899Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111058","references":[{"url":"https://github.com/mljar/mercury/security/advisories/GHSA-rv4m-xm3f-3ccq","label":"https://github.com/mljar/mercury/security/advisories/GHSA-rv4m-xm3f-3ccq"},{"url":"https://github.com/mljar/mercury/commit/73a40ceb0becf057f495a5738ad7f5a5222a53e1","label":"https://github.com/mljar/mercury/commit/73a40ceb0becf057f495a5738ad7f5a5222a53e1"},{"url":"https://github.com/mljar/mercury/releases/tag/3.2.6","label":"https://github.com/mljar/mercury/releases/tag/3.2.6"},{"url":"https://github.com/advisories/GHSA-rv4m-xm3f-3ccq"}],"tags":["cve.org","ghsa","pip"],"aliases":["GHSA-rv4m-xm3f-3ccq"],"ecosystem":"pip","patched":["mercury 3.2.6"],"ingestedAt":"2026-10-19T16:32:30.071Z","slug":"CVE-2026-111058","body":"## Overview\n\nMercury 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.\n\n## Affected\n\n- `mercury < 3.2.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-111058)\n\nAffected packages:\n\n- `mercury <= 3.2.5`\n\nPatched in:\n\n- `mercury 3.2.6`\n\nSource: https://github.com/advisories/GHSA-rv4m-xm3f-3ccq","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}