{"id":"CVE-2026-53716","summary":"Envoy Gateway: Wasm HTTP fetch decompresses gzip without output-size limit","details":"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.","aliases":["GHSA-cxpq-8v7q-cg56","GO-2026-6006"],"modified":"2026-09-18T03:30:47.313771588Z","published":"2026-09-14T20:15:51.441Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53716.json"},"references":[{"type":"WEB","url":"https://github.com/envoyproxy/gateway/releases/tag/v1.7.4"},{"type":"WEB","url":"https://github.com/envoyproxy/gateway/releases/tag/v1.8.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53716.json"},{"type":"ADVISORY","url":"https://github.com/envoyproxy/gateway/security/advisories/GHSA-cxpq-8v7q-cg56"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53716"},{"type":"FIX","url":"https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464"},{"type":"FIX","url":"https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7"},{"type":"FIX","url":"https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead"},{"type":"FIX","url":"https://github.com/envoyproxy/gateway/pull/9171"},{"type":"FIX","url":"https://github.com/envoyproxy/gateway/pull/9172"},{"type":"FIX","url":"https://github.com/envoyproxy/gateway/pull/9173"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/envoyproxy/gateway","events":[{"introduced":"0"},{"introduced":"2de2611fdbbca83d4a1ede99417c90fcdead24d9"},{"fixed":"062b176235b72d339fac340d23dd37679b36dca6"},{"fixed":"097ab899b9d041452d02f15d738514eda10ea21b"},{"fixed":"5a78db82b7cf4fc5bebbeda2c50952892038a464"},{"fixed":"96e2b750868a459ace4b8b68e6a6e4fb0152b9b7"},{"fixed":"b4737180c7e597490c6363075c565fa8cf24eead"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.7.4"},{"introduced":"1.8.0-rc.0"},{"fixed":"1.8.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.8.0","v1.7.3","v1.8.0-rc.1","v1.9.0-rc.0","v1.7.2","v1.7.1","v1.8.0-rc.0","v1.7.0","v1.7.0-rc.2","v1.7.0-rc.1","v1.7.0-rc.0","v1.6.0-rc.0","latest","v0.5.0-rc.1","v0.2.0","v0.2.0-rc2","v0.2.0-rc1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53716.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}