{"id":"CVE-2026-118265","revision":"71468eac5239490fb7af709704801084","records":[{"revision":"71468eac5239490fb7af709704801084","observedAt":"2026-10-28T19:46:48.975+00:00","statement":{"source":"cve-program","id":"CVE-2026-118265","aliases":[],"title":"Echo: X-Real-IP extractor trusts the header value instead of the sending peer","description":"Echo is a Go web framework. From 5.0.0 until 5.4.1, Echo v5's ExtractIPFromRealIPHeader validates whether the client-supplied X-Real-IP value belongs to a trusted range instead of validating the direct network peer. A client reaching Echo directly, or through a proxy that preserves the header, can supply a loopback or private address and have Context.RealIP return that spoofed identity. Applications using the extractor for IP allowlists, rate limiting, audit logs, or forwarding headers can consequently trust an attacker-controlled address; the default direct extractor and Echo v4 are unaffected. This issue is fixed in 5.4.1.","state":0,"publishedAt":"2026-10-28T19:03:56.934+00:00","modifiedAt":"2026-10-28T19:03:56.934+00:00","affected":[{"ecosystem":"Vendor product","name":"echo","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"labstack\",\n                    \"product\": \"echo\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 5.0.0, < 5.4.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/labstack/echo/security/advisories/GHSA-h53f-rm2w-w7rg","https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaae","https://github.com/labstack/echo/releases/tag/v5.4.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118265","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-118265","identifiers":["CVE-2026-118265"]},"retained":false,"historicalAffected":[]}],"coverage":[]}