{"id":"CVE-2026-9077","aliases":["EUVD-2026-53463","GHSA-wq3q-gcx9-xvm2"],"status":"published","title":"Reliance on Untrusted Inputs in a Security Decision vulnerabilities in Model Context Protocol features","description":"IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.","severity":{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00437,"percentile":0.38232,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-807"],"published":"2026-08-05T16:24:43Z","modified":"2026-11-04T02:47:53Z","products":[{"vendor":"ibm","product":"langflow oss"},{"vendor":"langflow","product":"langflow"}],"references":[{"url":"https://www.ibm.com/support/pages/node/7282147","tags":["vendor-advisory","patch","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9077"},{"url":"https://github.com/advisories/GHSA-wq3q-gcx9-xvm2"}],"sources":{"cve":[{"id":"CVE-2026-9077","title":"Reliance on Untrusted Inputs in a Security Decision vulnerabilities in Model Context Protocol features","description":"IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.","status":"published","published":"2026-08-05T16:24:43.123Z","modified":"2026-08-05T18:11:44.684Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-807"],"updated_at":"2026-11-02T13:42:37.965383Z"}],"euvd":[{"id":"EUVD-2026-53463","description":"IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.","status":"published","published":"2026-08-05T16:24:43Z","modified":"2026-08-05T18:11:44Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T18:02:09.520152Z"}],"ghsa":[{"id":"GHSA-wq3q-gcx9-xvm2","title":"IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass...","description":"IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.","status":"published","published":"2026-08-05T18:31:40Z","modified":"2026-08-05T18:31:48Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high"}],"cwes":["CWE-807"],"updated_at":"2026-11-02T15:10:07.926015Z"}],"nvd":[{"id":"CVE-2026-9077","description":"IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.","status":"published","published":"2026-08-05T17:16:57.51Z","modified":"2026-08-06T19:01:53.15Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-807"],"updated_at":"2026-11-02T14:12:35.031043Z"}],"osv":[{"id":"CVE-2026-9077","description":"IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.","status":"published","published":"2026-08-05T17:16:57.51Z","modified":"2026-11-04T02:47:53.324343337Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","level":"high"}],"updated_at":"2026-11-04T02:53:00.786919Z"}]}}