{"id":"CVE-2026-118265","sourceIdentifier":"security-advisories@github.com","published":"2026-10-28T19:17:31.377","lastModified":"2026-10-29T21:17:15.783","vulnStatus":"Undergoing Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"labstack","product":"echo","versions":[{"version":">= 5.0.0, < 5.4.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-29T15:43:31.934498Z","id":"CVE-2026-118265","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-348"}]}],"references":[{"url":"https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaae","source":"security-advisories@github.com"},{"url":"https://github.com/labstack/echo/releases/tag/v5.4.1","source":"security-advisories@github.com"},{"url":"https://github.com/labstack/echo/security/advisories/GHSA-h53f-rm2w-w7rg","source":"security-advisories@github.com"}]}