{"id":"CVE-2026-53717","revision":"a4c9b02780f14cc489bcecb779aa5dfe","records":[{"revision":"a4c9b02780f14cc489bcecb779aa5dfe","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53717","aliases":[],"title":"Envoy Gateway: OCI layer extraction allocates make([]byte, h.Size) from untrusted tar header","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, internal/wasm/imagefetcher.go follows tenant-controlled EnvoyExtensionPolicy spec.wasm[].code.image.url values to Docker or OCI Wasm layers, and extractWasmPluginBinary uses the untrusted tar-header h.Size value to allocate memory before validating the entry name or declared size. A small PAX or GNU tar header can therefore claim a multi-terabyte entry even though the surrounding LimitReader restricts only the bytes read from the stream, and no registry allowlist prevents a permitted tenant from selecting an attacker-controlled registry that the controller can reach. The allocation is attempted for every tar entry and can cause an unrecoverable Go runtime out-of-memory failure; because the custom resource persists, reconciliation repeatedly crash-loops the shared controller and causes a single-request, non-volumetric, cluster-wide control-plane denial of service. This issue is fixed in versions 1.7.4 and 1.8.1.","state":0,"publishedAt":"2026-09-14T20:09:44.99+00:00","modifiedAt":"2026-09-15T19:30:12.383+00:00","affected":[{"ecosystem":"Vendor product","name":"gateway","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"envoyproxy\",\n                    \"product\": \"gateway\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.7.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 1.8.0-rc.0, < 1.8.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/envoyproxy/gateway/security/advisories/GHSA-h7pq-86h8-rp5x","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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53717","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53717","identifiers":["CVE-2026-53717"]},"retained":false,"historicalAffected":[]}],"coverage":[]}