CVE-2026-118261Published

Echo: Decompress permits unbounded gzip expansion in v4

Exact source revision recorded 28 Oct 2026 19:46:48 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-118261

Published

Echo is a Go web framework. From 4.0.0 until 4.16.1, Echo v4's opt-in Decompress middleware exposes a gzip-decoded request stream without limiting its expanded size. A small compressed request can expand into a very large body when a handler reads or binds it, consuming excessive memory or CPU and allowing repeated or concurrent requests to cause denial of service. The middleware is not enabled by default, and limiting only the compressed request size does not bound the decoded size. This issue is fixed in 4.16.1.

Source published: 28 Oct 2026 18:58:43 UTC
Source modified: 28 Oct 2026 18:58:43 UTC
Observed here: 28 Oct 2026 19:46:48 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 4.0 · 8.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N