CVE-2026-48044

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{"affected": [{"affectedData": [{"product": "envoy", "vendor": "envoyproxy", "versions": [{"status": "affected", "version": ">= 1.38.0, < 1.38.1"}, {"status": "affected", "version": ">= 1.37.0, < 1.37.3"}, {"status": "affected", "version": ">= 1.36.0, < 1.36.7"}, {"status": "affected", "version": ">= 1.23.0, < 1.35.11"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "matchCriteriaId": "393300D8-1B04-493A-83B5-E8AEF0946D76", "versionEndExcluding": "1.35.13", "versionStartIncluding": "1.23.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "matchCriteriaId": "B1146A14-3C49-48C3-BC2A-1BBB202EBD84", "versionEndExcluding": "1.36.9", "versionStartIncluding": "1.36.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "matchCriteriaId": "2057BF79-00D1-4154-9DC0-3F278C72F4E1", "versionEndExcluding": "1.37.5", "versionStartIncluding": "1.37.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "matchCriteriaId": "2A218AD4-BF4B-46EA-96D7-3B25B7E71AC8", "versionEndExcluding": "1.38.3", "versionStartIncluding": "1.38.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Envoy es un proxy de borde y de servicio de c\u00f3digo abierto dise\u00f1ado para aplicaciones nativas de la nube. Desde la versi\u00f3n 1.23.0 hasta la 1.35.11, 1.36.7, 1.37.3 y 1.38.1, se ha identificado una vulnerabilidad en la implementaci\u00f3n del descompresor zstd de Envoy (ZstdDecompressorImpl). Cuando la descompresi\u00f3n zstd est\u00e1 habilitada, el procesamiento de una carga \u00fatil zstd especialmente dise\u00f1ada y altamente comprimida puede provocar una asignaci\u00f3n masiva de memoria. Un atacante puede explotar esto para causar un agotamiento severo de la memoria, lo que podr\u00eda resultar en una terminaci\u00f3n por falta de memoria (OOM) y una denegaci\u00f3n de servicio (DoS) para el proxy Envoy. Esta vulnerabilidad est\u00e1 corregida en las versiones 1.35.11, 1.36.7, 1.37.3 y 1.38.1."}], "id": "CVE-2026-48044", "lastModified": "2026-10-25T17:10:00.197", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48044", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-26T18:31:06.118463Z", "version": "2.0.3"}}]}, "published": "2026-06-26T18:16:59.767", "references": [{"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory", "Exploit"], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-409"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "Envoy: Envoy: Denial of Service via specially crafted zstd payload", "id": "2493649", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2493649"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["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.", "A flaw was found in Envoy, an open source edge and service proxy. A remote attacker can exploit this vulnerability by sending a specially crafted, highly compressed zstd payload to an Envoy proxy with zstd decompression enabled. This can lead to massive memory allocation, causing severe memory exhaustion and potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-48044", "package_state": [{"cpe": "cpe:/a:redhat:service_mesh:2", "fix_state": "Affected", "package_name": "openshift-service-mesh/proxyv2-rhel9", "product_name": "OpenShift Service Mesh 2"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Affected", "package_name": "openshift-service-mesh/istio-proxyv2-rhel9", "product_name": "OpenShift Service Mesh 3"}], "public_date": "2026-06-26T17:31:37Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-48044\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-48044\nhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg"], "statement": "This vulnerability in Envoy's zstd decompressor is rated as Important, as a remote, unauthenticated attacker can induce a denial of service. By sending a specially crafted zstd payload, an attacker can cause excessive memory allocation, leading to an Out-Of-Memory condition and service disruption for Envoy proxy instances deployed in Red Hat environments.", "threat_severity": "Important"}

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