{"id":"CVE-2026-69257","aliases":["GHSA-c6xh-wv4j-ppv5"],"url":"https://o3.security/vulnerability/CVE-2026-69257","summary":"Flowise: SSRF Protection Bypass via IPv4-Mapped IPv6 Addresses","details":"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:169.254.169.254 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.","published":"2026-08-04T15:51:47.700Z","modified":"2026-09-16T03:47:21.207954975Z","cvss":null,"epss":{"score":0.00246,"percentile":0.16215,"asOf":"2026-08-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"flowise","fixedVersion":"3.1.3"}],"fix":{"url":"https://github.com/FlowiseAI/Flowise/commit/0fc769208395641c1411ccdb9c81416e54802155","label":"FlowiseAI/Flowise@0fc7692"},"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-2026-69257.json"},{"type":"ADVISORY","url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c6xh-wv4j-ppv5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69257"},{"type":"FIX","url":"https://github.com/FlowiseAI/Flowise/commit/0fc769208395641c1411ccdb9c81416e54802155"},{"type":"FIX","url":"https://github.com/FlowiseAI/Flowise/pull/6431"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T03:47:21.207954975Z"}}