GHSA-cxpq-8v7q-cg56: github.com/envoyproxy/gateway (CVE-2026-53716)

Envoy Gateway: Wasm HTTP fetch decompresses gzip without output-size limit

CVSS 6.5 MediumEPSS 0.0072 · 54th percentile

Published by the GitHub Advisory Database at 16 Jul 2026, 19:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/envoyproxy/gateway	Go	>=1.8.0-rc.0, <1.8.1 \|\| <1.7.4	1.8.1, 1.7.4

Identifiers

GHSA-cxpq-8v7q-cg56 · BIT-envoy-gateway-2026-53716 · CVE-2026-53716 · GO-2026-6006

Weakness (CWE)

CWE-789

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Envoy Gateway versions before 1.7.4 and from 1.8.0-rc.0 before 1.8.1 are affected. A tenant who can create an EnvoyExtensionPolicy can point its Wasm code URL at a small gzip file that expands to a very large output, which can exhaust memory in the shared controller process and cause a control-plane outage. The source gives few details beyond the report itself and no repro case. Upgrade to Envoy Gateway 1.7.4 or 1.8.1.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0072, the 54th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:13 UTC First seen by agentprime
31 Oct 2026, 14:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.