Vulnerability-Lookup

CVE-2026-26310 (GCVE-0-2026-26310)

Vulnerability from cvelistv5 – Published: 2026-03-10 19:08 – Updated: 2026-03-10 20:12

Title

Crash for scoped ip address in Envoy during DNS

Summary

Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/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 2026-03-10 20:10 UTC

CWE

CWE-20 - Improper Input Validation

Assigner

GitHub_M mitre root

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: >= 1.37.0, < 1.37.1 Affected: >= 1.36.0, < 1.36.5 Affected: >= 1.35.0, < 1.35.9 Affected: < 1.34.13	guessed

Show details on NVD website

JSON

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bit-envoy-2026-26310

Vulnerability from bitnami_vulndb

Published

2026-03-12 08:39

Modified

2026-09-08 08:34

Summary

Crash for scoped ip address in Envoy during DNS

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "envoy",
        "purl": "pkg:bitnami/envoy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.34.13"
            },
            {
              "introduced": "1.35.0"
            },
            {
              "fixed": "1.35.9"
            },
            {
              "introduced": "1.36.0"
            },
            {
              "fixed": "1.36.5"
            },
            {
              "introduced": "1.37.0"
            },
            {
              "fixed": "1.37.1"
            }
          ],
          "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-2026-26310"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:go:*:*"
    ],
    "severity": "High"
  },
  "details": "Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.",
  "id": "BIT-envoy-2026-26310",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-03-12T08:39:44.551Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26310"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Crash for scoped ip address in Envoy during DNS"
}

FKIE_CVE-2026-26310

Vulnerability from fkie_nvd - Published: 2026-03-10 20:16 - Updated: 2026-06-17 10:26

Severity

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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-3cw6-2j68-868p	Exploit, Vendor Advisory

Impacted products

Vendor	Product	Version
envoyproxy	envoy	*
envoyproxy	envoy	*
envoyproxy	envoy	*
envoyproxy	envoy	1.37.0

JSON

To clipboard

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            },
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            },
            {
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            },
            {
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            }
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      ],
      "source": "security-advisories@github.com"
    }
  ],
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    },
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      "lang": "es",
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    }
  ],
  "id": "CVE-2026-26310",
  "lastModified": "2026-06-17T10:26:04.063",
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          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
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      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-3CW6-2J68-868P

Vulnerability from github – Published: 2026-03-10 18:16 – Updated: 2026-03-11 20:42

Summary

Envoy vulnerable to crash for scoped ip address during DNS

Details

Summary

Calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter.

Details

The crashing function is Utility::getAddressWithPort. The crash occurs if a string containing a scoped IPv6 address is passed to this function.

This vulnerability affects:

The original src filter: If the filter is configured and the original source is a scoped IPv6 address, it will cause a crash.
DNS response address resolution: If a DNS response contains a scoped IPv6 address, this will also trigger the crash.

PoC

To reproduce the vulnerability:

Method A (Original Src Filter): Configure the original src filter in Envoy and provide a scoped IPv6 address as the original source.
Method B (DNS Resolution): Trigger a DNS resolution process within Envoy where the DNS response contains a scoped IPv6 address.

Impact

This is a Denial of Service (DoS) vulnerability. It impacts users who have the original src filter configured or whose Envoy instances resolve addresses from DNS responses that may contain scoped IPv6 addresses.

Severity

5.9 (Medium)


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

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/envoyproxy/envoy"
      },
      "versions": [
        "1.37.0"
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/envoyproxy/envoy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.36.0"
            },
            {
              "last_affected": "1.36.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/envoyproxy/envoy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.35.0"
            },
            {
              "last_affected": "1.35.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/envoyproxy/envoy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.34.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-26310"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-10T18:16:26Z",
    "nvd_published_at": "2026-03-10T20:16:36Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nCalling `Utility::getAddressWithPort` with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter.\n\n### Details\n\nThe crashing function is `Utility::getAddressWithPort`. The crash occurs if a string containing a scoped IPv6 address is passed to this function.\n\nThis vulnerability affects:\n\n1. The **original src filter**: If the filter is configured and the original source is a scoped IPv6 address, it will cause a crash.\n2. **DNS response address resolution**: If a DNS response contains a scoped IPv6 address, this will also trigger the crash.\n\n### PoC\n\nTo reproduce the vulnerability:\n\n1. **Method A (Original Src Filter):** Configure the `original src` filter in Envoy and provide a scoped IPv6 address as the original source.\n2. **Method B (DNS Resolution):** Trigger a DNS resolution process within Envoy where the DNS response contains a scoped IPv6 address.\n\n### Impact\n\nThis is a Denial of Service (DoS) vulnerability. It impacts users who have the `original src` filter configured or whose Envoy instances resolve addresses from DNS responses that may contain scoped IPv6 addresses.",
  "id": "GHSA-3cw6-2j68-868p",
  "modified": "2026-03-11T20:42:23Z",
  "published": "2026-03-10T18:16:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26310"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/envoyproxy/envoy"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Envoy vulnerable to crash for scoped ip address during DNS"
}

WID-SEC-W-2026-0704

Vulnerability from csaf_certbund - Published: 2026-03-11 23:00 - Updated: 2026-04-01 22:00

Summary

Google Cloud Platform Envoy Proxy, Istio und Service Mesh: Mehrere Schwachstellen

Severity

Mittel

Scope

7 vulnerabilities in this advisory, including CVE-2026-26310.

CVE-2026-26310

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.

Detection rules are retrieved from Rulezet.

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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Action not permitted

CVE-2026-26310 (GCVE-0-2026-26310)

bit-envoy-2026-26310

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-26310

GHSA-3CW6-2J68-868P

Summary

Details

PoC

Impact

WID-SEC-W-2026-0704

Tags

Sightings

Nomenclature

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