{"id":"CVE-2026-53717","title":"Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway","summary":"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[].…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-789"],"vendor":"envoyproxy","product":"gateway","affected":["gateway < 1.7.4","gateway >= 1.8.0-rc.0, < 1.8.1"],"patched":["github.com/envoyproxy/gateway 1.8.1","github.com/envoyproxy/gateway 1.7.4"],"published":"2026-09-14","updated":"2026-09-15","sourceUpdated":"2026-09-15T20:17:18.793","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53717","references":[{"url":"https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/pull/9171","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/pull/9172","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/pull/9173","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/releases/tag/v1.7.4","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/releases/tag/v1.8.1","label":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/security/advisories/GHSA-h7pq-86h8-rp5x","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-h7pq-86h8-rp5x"},{"url":"https://github.com/envoyproxy/gateway"}],"tags":["nvd","cve.org","ghsa","go","osv"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T19:29:49.750607Z"},"epss":0.00715,"epssPercentile":0.51853,"aliases":["GHSA-h7pq-86h8-rp5x","BIT-envoy-gateway-2026-53717","GO-2026-6008"],"ecosystem":"go","ingestedAt":"2026-07-16T19:57:16.722Z","slug":"CVE-2026-53717","body":"## Overview\n\nEnvoy 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-53717)\n\nAffected packages:\n\n- `github.com/envoyproxy/gateway >= 1.8.0-rc.0, < 1.8.1`\n- `github.com/envoyproxy/gateway < 1.7.4`\n\nPatched in:\n\n- `github.com/envoyproxy/gateway 1.8.1`\n- `github.com/envoyproxy/gateway 1.7.4`\n\nSource: https://github.com/advisories/GHSA-h7pq-86h8-rp5x","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}