CVE-2026-118653

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.

Score

CVSS 3.1 5.3 Medium

Status

Received - security-advisories@github.com

Published

2026-10-28

Last modified

2026-10-28

Weaknesses

CWE-290

Affected products

• Echo (Labstack)

References

• https://github.com/labstack/echo/security/advisories/GHSA-246p-cpwv-v3jq
• https://github.com/labstack/echo/commit/22e4b71109ef072ef011a489066ec662ca9565b2
• https://github.com/labstack/echo/releases/tag/v5.1.0