CVE-2026-118265

Name	CVE-2026-118265
Description	Echo is a Go web framework. From 5.0.0 until 5.4.1, Echo v5's ExtractIPFromRealIPHeader validates whether the client-supplied X-Real-IP value belongs to a trusted range instead of validating the direct network peer. A client reaching Echo directly, or through a proxy that preserves the header, can supply a loopback or private address and have Context.RealIP return that spoofed identity. Applications using the extractor for IP allowlists, rate limiting, audit logs, or forwarding headers can consequently trust an attacker-controlled address; the default direct extractor and Echo v4 are unaffected. This issue is fixed in 5.4.1.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
golang-github-labstack-echo (PTS)	bookworm	4.2.1-3	fixed
	forky, sid, trixie	4.12.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
golang-github-labstack-echo	source	(unstable)	(not affected)

Notes

- golang-github-labstack-echo <not-affected> (Vulnerable code introduced later)
https://github.com/labstack/echo/security/advisories/GHSA-h53f-rm2w-w7rg
Fixed by: https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaae (v5.4.1)