{"id":"CVE-2026-73530","title":"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 iden…","summary":"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 iden…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-918"],"published":"2026-08-13","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:35:08.537","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73530","references":[{"url":"https://github.com/flytohub/flyto-core/releases/tag/v2.28.0","label":"disclosure@vulncheck.com"},{"url":"https://github.com/flytohub/flyto-core/security/advisories/GHSA-gc4h-hj7x-gp5p","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/flyto2-core-ssrf-guard-bypass-via-is-private-ip","label":"disclosure@vulncheck.com"},{"url":"https://github.com/flytohub/flyto-core/security/advisories/GHSA-gc4h-hj7x-gp5p","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00397,"epssPercentile":0.33614,"ingestedAt":"2026-09-09T21:22:45.534Z","slug":"CVE-2026-73530","body":"## Overview\n\nFlyto2 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}