Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-06-30 23:39

Modified

2026-07-01 00:07

Summary

Envoy: Segmentation fault when using %REQUESTED_SERVER_NAME% in log format

Details

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, when the %REQUESTED_SERVER_NAME(X:Y)% is used in log format and host related options is specified, like HOST_FIRST, SNI_FIRST, it's possible to crash Envoy when the specified host header is missing in the request headers. This vulnerability is fixed in 1.37.5 and 1.38.3.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "envoy",
        "purl": "pkg:bitnami/envoy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.37.0"
            },
            {
              "fixed": "1.37.5"
            },
            {
              "introduced": "1.38.0"
            },
            {
              "fixed": "1.38.3"
            }
          ],
          "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-2026-47220"
  ],
  "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 1.37.0 until 1.37.5 and 1.38.3, when the %REQUESTED_SERVER_NAME(X:Y)% is used in log format and host related options is specified, like HOST_FIRST, SNI_FIRST, it\u0027s possible to crash Envoy when the specified host header is missing in the request headers. This vulnerability is fixed in 1.37.5 and 1.38.3.",
  "id": "BIT-envoy-2026-47220",
  "modified": "2026-07-01T00:07:50.168Z",
  "published": "2026-06-30T23:39:23.144Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j9wh-4qfm-wf2v"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47220"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Envoy: Segmentation fault when using %REQUESTED_SERVER_NAME% in log format"
}

CVE-2026-47220 (GCVE-0-2026-47220)

Vulnerability from cvelistv5 – Published: 2026-06-26 18:02 – Updated: 2026-06-30 12:10

Title

Envoy: Segmentation fault when using %REQUESTED_SERVER_NAME% in log format

Summary

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: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/envoyproxy/envoy/security/advi…	x_refsource_CONFIRM
https://access.redhat.com/security/cve/CVE-2026-47220	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2493652	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

3 products

Vendor	Product	Version
envoyproxy	envoy	Affected: >= 1.38.0, < 1.38.3 Affected: >= 1.37.0, < 1.37.5
Red Hat	OpenShift Service Mesh 2	cpe:/a:redhat:service_mesh:2
Red Hat	OpenShift Service Mesh 3	cpe:/a:redhat:service_mesh:3

Show details on NVD website

JSON

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                "id": "CVE-2026-47220",
                "options": [
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                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-29T13:26:27.302143Z",
                "version": "2.0.3"
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        ],
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        "descriptions": [
          {
            "lang": "en",
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        "providerMetadata": {
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            ],
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            "time": "2026-06-26T18:02:17.679Z",
            "value": "Made public."
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        ],
        "title": "envoy: Envoy: Denial of Service via missing host header in specific logging configurations",
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    "cna": {
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      ],
      "metrics": [
        {
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}

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.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-47220 (GCVE-0-2026-47220)

Tags

Sightings

Nomenclature