{"id":"CVE-2026-53717","sourceIdentifier":"security-advisories@github.com","published":"2026-09-14T20:16:45.270","lastModified":"2026-09-30T17:43:24.057","vulnStatus":"Awaiting Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"envoyproxy","product":"gateway","versions":[{"version":"< 1.7.4","status":"affected"},{"version":">= 1.8.0-rc.0, < 1.8.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-15T19:29:49.750607Z","id":"CVE-2026-53717","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-789"}]}],"references":[{"url":"https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464","source":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7","source":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead","source":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/pull/9171","source":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/pull/9172","source":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/pull/9173","source":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/releases/tag/v1.7.4","source":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/releases/tag/v1.8.1","source":"security-advisories@github.com"},{"url":"https://github.com/envoyproxy/gateway/security/advisories/GHSA-h7pq-86h8-rp5x","source":"security-advisories@github.com"}]}