---
cve: "CVE-2026-53716"
severity: "MEDIUM"
cvss: 6.5
epss: "0.7%"
vendor: "envoyproxy"
kev: false
exploited: false
published: "2026-09-14 21:17:12"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T11:21:27+02:00"
---

# CVE-2026-53716

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, getFileFromGZ in internal/wasm/httpfetcher.go calls io.ReadAll on a gzip.Reader without limiting decompressed output when a tenant-controlled EnvoyExtensionPolicy.spec.wasm[].code.http.url points to a reachable compressed Wasm payload. The 256 MiB compressed-input cap does not constrain the expanded size, no operator Wasm URL allowlist exists, and the optional sha256 check occurs only after decompression, so a comparatively small gzip stream can force a multi-gigabyte allocation in the shared controller. The resulting out-of-memory termination restarts the controller, re-reconciles the persistent custom resource, and can create a persistent cross-tenant control-plane outage. This issue is fixed in versions 1.7.4 and 1.8.1.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 062b176235b72d339fac340d23dd37679b36dca6 (Commit)
- 097ab899b9d041452d02f15d738514eda10ea21b (Commit)

## Referenzen

- <https://github.com/envoyproxy/gateway/security/advisories/GHSA-cxpq-8v7q-cg56>
- <https://github.com/envoyproxy/gateway/pull/9171>
- <https://github.com/envoyproxy/gateway/pull/9172>
- <https://github.com/envoyproxy/gateway/pull/9173>
- <https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464>
- <https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7>
- <https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead>
- <https://github.com/envoyproxy/gateway/releases/tag/v1.7.4>
- <https://github.com/envoyproxy/gateway/releases/tag/v1.8.1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53716) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_