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CVE-2026-73530

7.7 · HIGH

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 `::`…

Published Aug 13, 2026CWE-918EPSS 0.43%

Overview

CVE-2026-73530 is a high-severity vulnerability. It was published on August 13, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/flytohub/flyto-core/releases/tag/v2.28.0GitHubgithub.com/flytohub/flyto-core/security/advisories/GHSA-gc4h-hj7x-gp5pRefwww.vulncheck.com/advisories/flyto2-core-ssrf-guard-bypass-via-is-private-ipGitHubgithub.com/flytohub/flyto-core/security/advisories/GHSA-gc4h-hj7x-gp5p

How CyberStrike helps

Frequently asked questions

What is CVE-2026-73530?

CVE-2026-73530 is a high-severity vulnerability. It was published on August 13, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-73530?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-73530?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-73530?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-73530 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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