flyto-core has SSRF guard bypass via IPv6 transition addresses (IPv4-mapped / 6to4 / NAT64) in validate_url_ssrf

Date Jul 6, 2026

Type Vendor advisory

Signal High-risk advisory

Vendor / Product PyPI · flyto-core

CVE CVE-2026-55787

High-risk advisory CVE-2026-55787

Summary

flyto-core has SSRF guard bypass via IPv6 transition addresses (IPv4-mapped / 6to4 / NAT64) in validate_url_ssrf

Why it matters

GitHub has published a reviewed security advisory for flyto-core. Prioritize it with other application dependency updates.

Operator check

Check whether flyto-core is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

GitHub Advisory GHSA-794r-5rp2-fpg8 NVD — CVE-2026-55787 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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