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CVE-2026-118651Published

Echo: Reverse Proxy Forwards Attacker-Supplied X-Real-IP to Upstream by Default

Exact source revision recorded 28 Oct 2026 20:55:13 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-118651

Published

Echo is a Go web framework. From 4.0.0 until 5.4.0, the Proxy middleware can preserve an attacker-supplied X-Real-IP header and forward it to an upstream service when Echo.IPExtractor is not configured. A remote client can therefore make upstream services receive a spoofed client address, undermining IP-based access controls, rate limiting, audit logging, or geographic restrictions that trust Echo's forwarded identity. This issue is fixed in Echo 5.4.0.

Source published
28 Oct 2026 19:30:01 UTC
Source modified
28 Oct 2026 19:31:47 UTC
Observed here
28 Oct 2026 20:55:13 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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Sources read 7 Nov 02:40 UTC · 271 of 275 readable · 270 fully read · documentation 465/469 current

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