Vulnerability-Lookup

CVE-2026-73549 (GCVE-0-2026-73549)

Vulnerability from cvelistv5 – Published: 2026-09-21 19:42 – Updated: 2026-09-22 13:29

Title

Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clusters

Summary

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's Utility::copyInternetAddressAndPort and QUIC client-address paths reconstruct scoped IPv6 addresses through addressAsString and Ipv6Instance. The string includes a percent scope identifier that inet_pton cannot parse, causing an exception or abort. Kernel-provided scoped IPv6 destinations in ORIGINAL_DST transparent-proxy deployments, and affected QUIC connection paths, can therefore terminate the process. The relevant scope boundary is that the HTTP use_http_header override rejects scoped addresses earlier; the advisory's crash path requires a kernel-provided original destination or the affected QUIC path. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-22 13:29 UTC

CWE

CWE-754 - Improper Check for Unusual or Exceptional Conditions

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7619 records in the last 180 days details

References

9 references

URL	Tags
https://github.com/envoyproxy/envoy/security/advi…	x_refsource_CONFIRM
https://github.com/envoyproxy/envoy/commit/109e5a…	x_refsource_MISC
https://github.com/envoyproxy/envoy/commit/59b174…	x_refsource_MISC
https://github.com/envoyproxy/envoy/commit/6e39f4…	x_refsource_MISC
https://github.com/envoyproxy/envoy/commit/ab2dca…	x_refsource_MISC
https://github.com/envoyproxy/envoy/releases/tag/…	x_refsource_MISC
https://github.com/envoyproxy/envoy/releases/tag/…	x_refsource_MISC
https://github.com/envoyproxy/envoy/releases/tag/…	x_refsource_MISC
https://github.com/envoyproxy/envoy/releases/tag/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
envoyproxy	envoy	Affected: < 1.36.10 Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1	guessed

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              "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10"
            },
            {
              "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
            },
            {
              "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
            },
            {
              "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
            }
          ],
          "source": {
            "advisory": "GHSA-jp5f-qr64-c9vw",
            "discovery": "UNKNOWN"
          },
          "title": "Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clusters"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-73549",
        "datePublished": "2026-09-21T19:42:48.561Z",
        "dateReserved": "2026-08-12T20:53:46.379Z",
        "dateUpdated": "2026-09-22T13:29:31.824Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

bit-envoy-2026-73549

Vulnerability from bitnami_vulndb

Published

2026-09-29 08:43

Modified

2026-10-06 12:12

Summary

Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clusters

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "envoy",
        "purl": "pkg:bitnami/envoy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.36.10"
            },
            {
              "introduced": "1.37.0"
            },
            {
              "fixed": "1.37.6"
            },
            {
              "introduced": "1.38.0"
            },
            {
              "fixed": "1.38.4"
            },
            {
              "introduced": "1.39.0"
            },
            {
              "fixed": "1.39.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-73549"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy\u0027s Utility::copyInternetAddressAndPort and QUIC client-address paths reconstruct scoped IPv6 addresses through addressAsString and Ipv6Instance. The string includes a percent scope identifier that inet_pton cannot parse, causing an exception or abort. Kernel-provided scoped IPv6 destinations in ORIGINAL_DST transparent-proxy deployments, and affected QUIC connection paths, can therefore terminate the process. The relevant scope boundary is that the HTTP use_http_header override rejects scoped addresses earlier; the advisory\u0027s crash path requires a kernel-provided original destination or the affected QUIC path. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.",
  "id": "BIT-envoy-2026-73549",
  "modified": "2026-10-06T12:12:21.709Z",
  "published": "2026-09-29T08:43:13.487Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/envoyproxy/envoy/commit/109e5a5b08ad10d99074cefd55a747a16ee64da7"
    },
    {
      "type": "FIX",
      "url": "https://github.com/envoyproxy/envoy/commit/59b1744a6cb62746db418ac06fc5e359fd25fdb7"
    },
    {
      "type": "FIX",
      "url": "https://github.com/envoyproxy/envoy/commit/6e39f4c94deff7a60d382c2d95883e0ea49ff691"
    },
    {
      "type": "FIX",
      "url": "https://github.com/envoyproxy/envoy/commit/ab2dca2d65b079768230a7c3d825afeefa330215"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-jp5f-qr64-c9vw"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73549"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Envoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clusters"
}

FKIE_CVE-2026-73549

Vulnerability from fkie_nvd - Published: 2026-09-21 20:17 - Updated: 2026-10-05 14:09

Severity

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

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/envoyproxy/envoy/commit/109e5a5b08ad10d99074cefd55a747a16ee64da7	Patch
security-advisories@github.com	https://github.com/envoyproxy/envoy/commit/59b1744a6cb62746db418ac06fc5e359fd25fdb7	Patch
security-advisories@github.com	https://github.com/envoyproxy/envoy/commit/6e39f4c94deff7a60d382c2d95883e0ea49ff691	Patch
security-advisories@github.com	https://github.com/envoyproxy/envoy/commit/ab2dca2d65b079768230a7c3d825afeefa330215	Patch
security-advisories@github.com	https://github.com/envoyproxy/envoy/releases/tag/v1.36.10	Release Notes
security-advisories@github.com	https://github.com/envoyproxy/envoy/releases/tag/v1.37.6	Release Notes
security-advisories@github.com	https://github.com/envoyproxy/envoy/releases/tag/v1.38.4	Release Notes
security-advisories@github.com	https://github.com/envoyproxy/envoy/releases/tag/v1.39.1	Release Notes
security-advisories@github.com	https://github.com/envoyproxy/envoy/security/advisories/GHSA-jp5f-qr64-c9vw	Vendor Advisory, Mitigation

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",
              "version": "\u003c 1.36.10"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.37.0, \u003c 1.37.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.38.0, \u003c 1.38.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.39.0, \u003c 1.39.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6A420B14-9ADA-4F6B-ACAA-3045E8690F04",
              "versionEndExcluding": "1.36.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1AD376F3-22D7-4BFB-B00C-BD68F464436F",
              "versionEndExcluding": "1.37.6",
              "versionStartIncluding": "1.37.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "840E030F-8746-4DBD-87C0-5DF7896294CC",
              "versionEndExcluding": "1.38.4",
              "versionStartIncluding": "1.38.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B5C1C594-8142-4F51-BE50-1AF50FD07129",
              "versionEndExcluding": "1.39.1",
              "versionStartIncluding": "1.39.0",
              "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. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy\u0027s Utility::copyInternetAddressAndPort and QUIC client-address paths reconstruct scoped IPv6 addresses through addressAsString and Ipv6Instance. The string includes a percent scope identifier that inet_pton cannot parse, causing an exception or abort. Kernel-provided scoped IPv6 destinations in ORIGINAL_DST transparent-proxy deployments, and affected QUIC connection paths, can therefore terminate the process. The relevant scope boundary is that the HTTP use_http_header override rejects scoped addresses earlier; the advisory\u0027s crash path requires a kernel-provided original destination or the affected QUIC path. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1."
    }
  ],
  "id": "CVE-2026-73549",
  "lastModified": "2026-10-05T14:09:22.283",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-73549",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-22T13:29:09.394045Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-21T20:17:28.567",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/envoyproxy/envoy/commit/109e5a5b08ad10d99074cefd55a747a16ee64da7"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/envoyproxy/envoy/commit/59b1744a6cb62746db418ac06fc5e359fd25fdb7"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/envoyproxy/envoy/commit/6e39f4c94deff7a60d382c2d95883e0ea49ff691"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/envoyproxy/envoy/commit/ab2dca2d65b079768230a7c3d825afeefa330215"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory",
        "Mitigation"
      ],
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-jp5f-qr64-c9vw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

OPENSUSE-SU-2026:11630-1

Vulnerability from csaf_opensuse - Published: 2026-08-28 00:00 - Updated: 2026-09-22 09:43

Summary

istioctl-1.30.4-1.1 on GA media

Severity

Moderate

Scope

13 vulnerabilities in this advisory, including CVE-2026-73549.

CVE-2026-73549

Recommended: 12 products

Open the full advisory

RHSA-2026:65106

Vulnerability from csaf_redhat - Published: 2026-09-08 06:50 - Updated: 2026-10-19 23:41

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.0.15

Severity

Important

Scope

18 vulnerabilities in this advisory, including CVE-2026-73549.

CVE-2026-73549

A flaw was found in Envoy. An attacker could cause a Denial of Service (DoS) by sending network requests using scoped Internet Protocol version 6 (IPv6) client addresses. Due to improper parsing when copying network addresses in original destination routing configurations and HTTP/3 connections, the application terminates unexpectedly, interrupting service availability.

5.3 (Medium)


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

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:65106

Open the full advisory

RHSA-2026:65112

Vulnerability from csaf_redhat - Published: 2026-09-08 07:01 - Updated: 2026-10-19 23:41

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.12

Severity

Important

Scope

18 vulnerabilities in this advisory, including CVE-2026-73549.

CVE-2026-73549

5.3 (Medium)


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

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:65112

Open the full advisory

RHSA-2026:65113

Vulnerability from csaf_redhat - Published: 2026-09-08 07:15 - Updated: 2026-10-19 23:41

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.2.9

Severity

Important

Scope

18 vulnerabilities in this advisory, including CVE-2026-73549.

CVE-2026-73549

5.3 (Medium)


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

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:65113

Open the full advisory

RHSA-2026:65115

Vulnerability from csaf_redhat - Published: 2026-09-08 07:27 - Updated: 2026-10-19 23:41

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.3.7

Severity

Important

Scope

18 vulnerabilities in this advisory, including CVE-2026-73549.

CVE-2026-73549

5.3 (Medium)


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

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:65115

Open the full advisory

RHSA-2026:65121

Vulnerability from csaf_redhat - Published: 2026-09-08 07:50 - Updated: 2026-10-19 23:41

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.4.2

Severity

Important

Scope

18 vulnerabilities in this advisory, including CVE-2026-73549.

CVE-2026-73549

5.3 (Medium)


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

Fixed: 4 products Known not affected: 21 products

https://access.redhat.com/errata/RHSA-2026:65121

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.

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CVE-2026-73549 (GCVE-0-2026-73549)

Vulnerability from bitnami_vulndb

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour