- CVSS
- HIGH · 8.6v3.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- Published
- 2026-08-04
- Weakness
- CWE-918, CWE-1389
- Source
- nvd.nist.gov/vuln/detail/CVE-2026-69257
Description
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.
References
- https://github.com/FlowiseAI/Flowise/commit/0fc769208395641c1411ccdb9c81416e54802155
- https://github.com/FlowiseAI/Flowise/pull/6431
- https://github.com/FlowiseAI/Flowise/releases/tag/[email protected]
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c6xh-wv4j-ppv5
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c6xh-wv4j-ppv5
How GTK Cyber trains on this
AI security training at GTK Cyber covers the LLM and ML-pipeline vulnerability classes that vulnerabilities like CVE-2026-69257 fall into. Our hands-on courses are taught by Charles Givre and other practitioners who break and defend production AI systems.