Envoy Gateway: Wasm HTTP fetch decompresses gzip without output-size limit
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| envoyproxy | gateway | affected |
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| Envoyproxy | Gateway |
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| Source | ID | Title |
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Github GHSA |
GHSA-cxpq-8v7q-cg56 | Envoy Gateway: Wasm HTTP fetch decompresses gzip without output-size limit |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.715% probability within 30 days)
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ssvc
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| First Time appeared |
Envoyproxy
Envoyproxy gateway |
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| Vendors & Products |
Envoyproxy
Envoyproxy gateway |
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| Description | 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. | |
| Title | Envoy Gateway: Wasm HTTP fetch decompresses gzip without output-size limit | |
| Weaknesses | CWE-789 | |
| References |
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| Metrics |
cvssV3_1
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