{"id":"CVE-2026-118653","summary":"Echo: Rate Limiter Bypass via Spoofed X-Forwarded-For Header in Default Configuration","details":"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.","aliases":["GHSA-246p-cpwv-v3jq"],"modified":"2026-10-29T10:46:09.522382213Z","published":"2026-10-28T19:42:05.556Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118653.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-290"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118653.json"},{"type":"FIX","url":"https://github.com/labstack/echo/commit/22e4b71109ef072ef011a489066ec662ca9565b2"},{"type":"WEB","url":"https://github.com/labstack/echo/releases/tag/v5.1.0"},{"type":"ADVISORY","url":"https://github.com/labstack/echo/security/advisories/GHSA-246p-cpwv-v3jq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118653"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/labstack/echo","events":[{"introduced":"6d9e043284aea2d07f5fcaf0d3a424eb7d9f6109"},{"fixed":"597b4faaa99b7995643f558c315993660c1e1f83"},{"fixed":"22e4b71109ef072ef011a489066ec662ca9565b2"}],"database_specific":{"extracted_events":[{"strategy":"StringRangeExpression","range":[{"introduced":"4.0.0"},{"fixed":"5.1.0"}],"source":"AFFECTED_FIELD"},{"range":[{"fixed":"22e4b71109ef072ef011a489066ec662ca9565b2"}],"source":"REFERENCES_COMMIT"},{"range":[{"fixed":"597b4faaa99b7995643f558c315993660c1e1f83"}],"source":"REFERENCES_TAG","original_tag":"v5.1.0"}]}}],"versions":["v5.0.4","v4.15.0","v5.0.3","v5.0.2","v5.0.1","v5.0.0","v4.14.0","v4.13.4","v4.13.3","v4.13.2","v4.13.1","v4.13.0","v4.12.0","v4.11.4","v4.11.3","v4.11.2","v4.11.1","v4.11.0","v4.10.2","v4.10.1","v4.10.0","v4.9.1","v4.9.0","v4.8.0","v4.7.2","v4.7.1","v4.7.0","v4.6.2","v4.6.1","v4.6.0","v4.5.0","v4.4.0","v4.3.0","v4.2.2","v4.2.1","v4.2.0","v4.1.17","v4.1.16","v4.1.15","v4.1.14","v4.1.13","v4.1.12","v4.1.11","v4.1.10","v4.1.9","v4.1.8","v4.1.7","v4.1.6","v4.1.5","v4.1.4","v4.1.3","v4.1.2","v4.1.1","v4.1.0","v4.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118653.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}