{"id":"CVE-2026-53716","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-53716","generatedAt":"2026-10-28T01:52:03.222Z","title":"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…","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.","published":"2026-09-14T21:17:13.000Z","lastModified":"2026-09-30T17:43:24.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-789"],"affected":[],"epss":{"score":0.00715,"percentile":0.53462,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.71%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"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-cxpq-8v7q-cg56","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53716","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}