CVE-2026-118653
Medium
Description
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductGithub.com/labstack/echo/v5
PublishedOct 28, 2026
First seenNov 4, 2026
Weakness typeCWE-290CWE-290
How to fix
Update
- github.com/labstack/echo/v55.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/labstack/echo/v5Go | v < 5.1.0 | 5.1.0 |
| github.com/labstack/echo/v4Go | 4.0.0 ≤ v ≤ 4.16.2 | — |
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