{"id":"CVE-2026-12763","title":"IBM Langflow OSS 1.0.0 through 1.11.5 could allow an authenticated attacker to access another user's MCP server context due to improper cache key isolation in the MCP Tools component.","summary":"IBM Langflow OSS 1.0.0 through 1.11.5 could allow an authenticated attacker to access another user's MCP server context due to improper cache key isolation in the MCP Tools component.","severity":"medium","cvss":4.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-306"],"vendor":"IBM","product":"Langflow OSS","affected":["langflow_oss >= 1.0.0 <= 1.11.5"],"published":"2026-09-14","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:24:58.293","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-12763","references":[{"url":"https://www.ibm.com/support/pages/node/7286662","label":"psirt@us.ibm.com"}],"tags":["nvd","cve.org"],"epss":0.00148,"epssPercentile":0.04378,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T17:23:53.606591Z"},"ingestedAt":"2026-09-14T21:15:17.560Z","slug":"CVE-2026-12763","body":"## Overview\n\nIBM Langflow OSS 1.0.0 through 1.11.5 could allow an authenticated attacker to access another user's MCP server context due to improper cache key isolation in the MCP Tools component.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":23.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}