Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck

CVE-2026-73530Flyto2 Core < 2.28.0 SSRF Guard Bypass via is_private_ip()

High 7.7

In plain English

A high-severity server-side request forgery in flyto-core from flytohub. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.4%top 62.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Flyto2 Core before 2.28.0 contains a server-side request forgery guard bypass vulnerability that allows attackers to reach internal services by supplying URLs using the unblocked IPv6 address `::` which the kernel routes to loopback identically to `0.0.0.0`. Attackers can submit requests or trigger 302 redirects to ` to bypass the private IP range and blocked hostname checks in `is_private_ip()`, reaching services bound to IPv6 loopback across the `http.get`, `http.request`, and `http.batch` modules.

Affected products (as reported)

Vendor	Product	Versions
flytohub	flyto-core	0 – before 2.28.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-gc4h-hj7x-gp5p) vendor-advisory
flyto-core 2.28.0 Release Notes release-notes
https://www.vulncheck.com/advisories/flyto2-core-ssrf-guard-bypass-via-is-private-ip third-party-advisory