{"id":"CVE-2026-69257","title":"Flowise is a drag & drop user interface to build a customized large language model flow","summary":"Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, Flowise's HTTP security module httpSecurity.ts did not normalize IPv4-mapped IPv6 addresses such as ::ffff:127.0.0.1 and ::ffff:169.…","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-918","CWE-1389"],"vendor":"flowiseai","product":"flowise","affected":["flowise < 3.1.3"],"patched":["flowise 3.1.3"],"published":"2026-08-04","updated":"2026-09-14","sourceUpdated":"2026-09-14T19:52:01.927","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-69257","references":[{"url":"https://github.com/FlowiseAI/Flowise/commit/0fc769208395641c1411ccdb9c81416e54802155","label":"security-advisories@github.com"},{"url":"https://github.com/FlowiseAI/Flowise/pull/6431","label":"security-advisories@github.com"},{"url":"https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3","label":"security-advisories@github.com"},{"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c6xh-wv4j-ppv5","label":"security-advisories@github.com"},{"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c6xh-wv4j-ppv5","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-c6xh-wv4j-ppv5"}],"tags":["nvd","ghsa","npm"],"epss":0.0028,"epssPercentile":0.20705,"aliases":["GHSA-c6xh-wv4j-ppv5"],"ecosystem":"npm","ingestedAt":"2026-08-04T16:40:31.845Z","slug":"CVE-2026-69257","body":"## Overview\n\nFlowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, Flowise's HTTP security module httpSecurity.ts did not normalize IPv4-mapped IPv6 addresses such as ::ffff:127.0.0.1 and ::ffff:169.254.169.254 before checking them against the deny list. Because ipaddr.js reports these addresses as ipv6 while IPv4 CIDR deny-list entries are ipv4, isDeniedIP() skipped the IPv4 CIDR checks. An attacker who controls DNS resolution for a hostname used by the HTTP Node, API Chain, Document Loader, MCP tool, or other paths using secureAxiosRequest(), secureFetch(), or checkDenyList() could return a AAAA record for an IPv4-mapped target and cause requests to reach localhost, internal services, or cloud metadata endpoints. This issue is fixed in version 3.1.3.\n\n## Affected\n\n- `flowise < 3.1.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `flowise 3.1.3`\n\n## Package advisory (CVE-2026-69257)\n\nAffected packages:\n\n- `flowise <= 3.1.2`\n\nPatched in:\n\n- `flowise 3.1.3`\n\nSource: https://github.com/advisories/GHSA-c6xh-wv4j-ppv5","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":203210,"id":"CVE-2026-69257","ts":1789416895688,"field":"cvss","old":null,"new":"8.6"}]}