GHSA-c6xh-wv4j-ppv5: Flowise: SSRF Protection Bypass via IPv4-Mapped IPv6 Addresses

Summary

Flowise's HTTP security module (`httpSecurity.ts`) does not normalize IPv4-mapped IPv6 addresses such as `::ffff:127.0.0.1` before checking the deny list. Because of an `ipaddr.js` kind mismatch (`ipv6` vs `ipv4`), all IPv4 CIDR deny rules are skipped for these addresses. An attacker who controls DNS for a hostname can set an AAAA record to `::ffff:<target_ipv4>` and bypass SSRF protections to reach internal services, cloud metadata endpoints and localhost. The affected versions are all versions up to and including v3.1.1.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

• flowisenpmLLM dependency since 2024-03-12

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