{"id":"CVE-2026-118653","sourceIdentifier":"security-advisories@github.com","published":"2026-10-28T20:17:22.400","lastModified":"2026-10-28T20:17:22.400","vulnStatus":"Received","cveTags":[],"descriptions":[{"lang":"en","value":"Echo is a Go web framework. From 4.0.0 until 5.1.0, Context.RealIP falls back to client-supplied X-Forwarded-For or X-Real-IP values when Echo.IPExtractor is unset, and the default RateLimiter uses that result as its client identifier. A remote attacker can rotate arbitrary forwarded-address values to obtain new rate-limit buckets and bypass IP-based throttling used for controls such as brute-force or request-volume protection. This issue is fixed in Echo v5.1.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"labstack","product":"echo","versions":[{"version":">= 4.0.0, < 5.1.0","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}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Primary","description":[{"lang":"en","value":"CWE-290"}]}],"references":[{"url":"https://github.com/labstack/echo/commit/22e4b71109ef072ef011a489066ec662ca9565b2","source":"security-advisories@github.com"},{"url":"https://github.com/labstack/echo/releases/tag/v5.1.0","source":"security-advisories@github.com"},{"url":"https://github.com/labstack/echo/security/advisories/GHSA-246p-cpwv-v3jq","source":"security-advisories@github.com"}]}