{"id":"CVE-2026-48044","aliases":["BIT-envoy-2026-48044","EUVD-2026-39820","GHSA-m3p9-47wh-88wg","openSUSE-SU-2026:11141-1"],"status":"published","title":"Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion","description":"Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a  vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00486,"percentile":0.42164,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-409"],"published":"2026-06-26T17:31:37Z","modified":"2026-10-28T02:30:48Z","fixes":[{"ecosystem":"Bitnami","package":"envoy","fixed_in":["1.35.11","1.36.7","1.37.3","1.38.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"envoy","ranges":[{"type":"SEMVER","events":[{"introduced":"1.23.0"},{"fixed":"1.35.11"},{"introduced":"1.36.0"},{"fixed":"1.36.7"},{"introduced":"1.37.0"},{"fixed":"1.37.3"},{"introduced":"1.38.0"},{"fixed":"1.38.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"istioctl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.30.2-1.1"}]}],"bundled":14}],"products":[{"vendor":"envoyproxy","product":"envoy"}],"references":[{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg","tags":["x_refsource_CONFIRM","Mitigation","Vendor Advisory","Exploit","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48044","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48044.json","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47204","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47205","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47207","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47220","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47221","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47692","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47775","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-47778","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-48042","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-48044","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-48090","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-48497","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-48706","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-48743","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-48044","title":"Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion","description":"Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a  vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.","status":"published","published":"2026-06-26T17:31:37.602Z","modified":"2026-06-26T18:31:20.28Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T13:50:49.872037Z"}],"euvd":[{"id":"EUVD-2026-39820","description":"Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a  vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.","status":"published","published":"2026-06-26T17:31:37Z","modified":"2026-06-26T18:31:20Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:20:24.118614Z"}],"nvd":[{"id":"CVE-2026-48044","description":"Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a  vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.","status":"published","published":"2026-06-26T18:16:59.767Z","modified":"2026-10-25T17:10:00.197Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T14:12:26.045561Z"}],"osv":[{"id":"CVE-2026-48044","title":"Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion","description":"Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a  vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.","status":"published","published":"2026-06-26T17:31:37.602Z","modified":"2026-10-28T02:30:48.985327748Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T15:45:06.701612Z"},{"id":"BIT-envoy-2026-48044","title":"Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion","description":"Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a  vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.","status":"published","published":"2026-06-30T23:39:33.609Z","modified":"2026-09-08T08:47:31.796255115Z","updated_at":"2026-11-02T15:28:29.563843Z"},{"id":"openSUSE-SU-2026:11141-1","title":"istioctl-1.30.2-1.1 on GA media","description":"These are all security issues fixed in the istioctl-1.30.2-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-06-28T00:00:00Z","modified":"2026-06-29T09:45:08.482872076Z","updated_at":"2026-11-02T16:58:38.95195Z"}]}}