CVE-2026-73530
Flyto2 Core < 2.28.0 SSRF Guard Bypass via is_private_ip()
- State
- Published
- Severity
- 6.3 Medium
- Published
- Aug 13, 2026
- Updated
- Aug 14, 2026
- Reserved
- Aug 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N | VulnCheck |
| 3.1 | 7.7 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
flyto-coreflytohub |
|
References
- GitHub Security Advisory (GHSA-gc4h-hj7x-gp5p)vendor-advisory
- flyto-core 2.28.0 Release Notesrelease-notes
- https://www.vulncheck.com/advisories/flyto2-core-ssrf-guard-bypass-via-is-private-ipthird-party-advisory
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