Vulnerability-Lookup

CVE-2026-48044 (GCVE-0-2026-48044)

Vulnerability from cvelistv5 – Published: 2026-06-26 17:31 – Updated: 2026-06-26 18:31

Title

Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion

Summary

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

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-26 18:31 UTC

CWE

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7933 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/envoyproxy/envoy/security/advi…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
envoyproxy	envoy	Affected: >= 1.38.0, < 1.38.1 Affected: >= 1.37.0, < 1.37.3 Affected: >= 1.36.0, < 1.36.7 Affected: >= 1.23.0, < 1.35.11	guessed

Show details on NVD website

JSON

To clipboard

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}

bit-envoy-2026-48044

Vulnerability from bitnami_vulndb

Published

2026-06-30 23:39

Modified

2026-09-08 08:34

Summary

Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "envoy",
        "purl": "pkg:bitnami/envoy"
      },
      "ranges": [
        {
          "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"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-48044"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "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\u0027s 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.",
  "id": "BIT-envoy-2026-48044",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-06-30T23:39:33.609Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48044"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion"
}

FKIE_CVE-2026-48044

Vulnerability from fkie_nvd - Published: 2026-06-26 18:16 - Updated: 2026-10-25 17:10

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg	Mitigation, Vendor Advisory, Exploit

Impacted products

Vendor	Product	Version
envoyproxy	envoy	*
envoyproxy	envoy	*
envoyproxy	envoy	*
envoyproxy	envoy	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "envoy",
          "vendor": "envoyproxy",
          "versions": [
            {
              "status": "affected",
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            },
            {
              "status": "affected",
              "version": "\u003e= 1.37.0, \u003c 1.37.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.36.0, \u003c 1.36.7"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.23.0, \u003c 1.35.11"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
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  ],
  "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\u0027s 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"
    }
  ]
}

OPENSUSE-SU-2026:11141-1

Vulnerability from csaf_opensuse - Published: 2026-06-28 00:00 - Updated: 2026-09-17 17:11

Summary

istioctl-1.30.2-1.1 on GA media

Severity

Moderate

Scope

14 vulnerabilities in this advisory, including CVE-2026-48044.

CVE-2026-48044

Recommended: 12 products

Open the full advisory

RHSA-2026:49705

Vulnerability from csaf_redhat - Published: 2026-08-03 16:33 - Updated: 2026-10-29 08:38

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.0.14

Severity

Important

Scope

5 vulnerabilities in this advisory, including CVE-2026-48044.

CVE-2026-48044

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.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:49705

Open the full advisory

RHSA-2026:49729

Vulnerability from csaf_redhat - Published: 2026-08-03 17:08 - Updated: 2026-10-29 08:38

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.11

Severity

Important

Scope

6 vulnerabilities in this advisory, including CVE-2026-48044.

CVE-2026-48044

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:49729

Open the full advisory

RHSA-2026:49744

Vulnerability from csaf_redhat - Published: 2026-08-03 17:33 - Updated: 2026-10-29 08:38

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.2.8

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2026-48044.

CVE-2026-48044

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:49744

Open the full advisory

RHSA-2026:49765

Vulnerability from csaf_redhat - Published: 2026-08-03 18:05 - Updated: 2026-10-29 08:38

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.3.6

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2026-48044.

CVE-2026-48044

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:49765

Open the full advisory

WID-SEC-W-2026-2048

Vulnerability from csaf_certbund - Published: 2026-06-23 22:00 - Updated: 2026-08-03 22:00

Summary

Google Cloud Service Mesh und Envoy Proxy: Mehrere Schwachstellen

Severity

Hoch

Scope

14 vulnerabilities in this advisory, including CVE-2026-48044.

CVE-2026-48044

Known affected: 7 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CVE-2026-48044 (GCVE-0-2026-48044)

Vulnerability from bitnami_vulndb

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Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour