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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| labstack | echo | >= 4.0.0, < 5.1.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | golang-github-labstack-echo | No fix yet | — |
| Debian 13 | golang-github-labstack-echo | No fix yet | — |
| Debian 12 | golang-github-labstack-echo | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | golang-github-labstack-echo | No fix yet | — |
| Ubuntu 26.04 LTS | golang-github-labstack-echo | No fix yet | — |
| Ubuntu 24.04 LTS | golang-github-labstack-echo | No fix yet | — |
| Ubuntu 22.04 LTS | golang-github-labstack-echo +2 | No fix yet | — |
| Ubuntu 20.04 LTS | golang-github-labstack-echo.v2 +1 | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | temporal +2 | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/labstack/echo/v4 | >= 4.0.0, <= 4.16.2 | — | GHSA-246p-cpwv-v3jq |
| Go | github.com/labstack/echo/v4 | >= 4.0.0 | — | GO-2026-6872 |
| Go | github.com/labstack/echo/v5 | < 5.1.0 | 5.1.0 | GHSA-246p-cpwv-v3jq |