CVE-2026-48044

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