{"id":"CVE-2026-69263","aliases":["GHSA-xc48-889x-5qmw"],"url":"https://o3.security/vulnerability/CVE-2026-69263","summary":"Flowise: CVE-2025-8943 Patch Bypass: npm_config_yes bypasses MCP environment variable blocklist (Unauthenticated RCE)","details":"Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the mitigation for CVE-2025-8943 blocked -y and --yes flags on npx, but packages/components/nodes/tools/MCP/core.ts denied only PATH, LD_LIBRARY_PATH, DYLD_LIBRARY_PATH, and NODE_OPTIONS by exact environment-variable name. Because npm reads configuration from npm_config_* variables, setting npm_config_yes=true reproduced --yes behavior without using a blocked flag, causing npx to auto-install and execute the named package when a Custom MCP server launched. This issue is fixed in version 3.1.3.","published":"2026-08-04T16:54:36.893Z","modified":"2026-09-16T03:47:17.094092205Z","cvss":null,"epss":{"score":0.00475,"percentile":0.40015,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"flowise","fixedVersion":"3.1.3"},{"ecosystem":"npm","name":"flowise-components","fixedVersion":"3.1.3"}],"fix":{"url":"https://github.com/FlowiseAI/Flowise/commit/a4c4e4988cded15edf725e762560575b889ae351","label":"FlowiseAI/Flowise@a4c4e49"},"references":[{"type":"WEB","url":"https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69263.json"},{"type":"ADVISORY","url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xc48-889x-5qmw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69263"},{"type":"FIX","url":"https://github.com/FlowiseAI/Flowise/commit/a4c4e4988cded15edf725e762560575b889ae351"},{"type":"FIX","url":"https://github.com/FlowiseAI/Flowise/pull/6471"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T03:47:17.094092205Z"}}