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

High · CVSS 7.7CVE-2026-73530

Flyto2 Core < 2.28.0 SSRF Guard Bypass via is_private_ip()

Answer in brief

CVE-2026-73530 records a High severity (CVSS 7.7) vulnerability in Flyto2 Core < 2.28.0 SSRF Guard Bypass via is_private_ip(). The current sources do not mark it as known exploited. The current feed maps flytohub/flyto-core (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 13, 2026Updated Sep 9, 2026Source checked Sep 28, 2026First seen by HOL Aug 13, 2026Material review Sep 9, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.7
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps flytohub/flyto-core (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
flytohub/flyto-coregeneric	>=0 <2.28.0	2.28.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for flytohub/flyto-core.
Review the reported fix. Update flytohub/flyto-core to 2.28.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 13, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.