CVE-2026-47220

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Source
https://cve.org/CVERecord?id=CVE-2026-47220
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47220.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-47220
Aliases
Downstream
Related
Published
2026-06-26T18:02:17.679Z
Modified
2026-07-08T08:26:14.105128314Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
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 %REQUESTEDSERVERNAME(X:Y)% is used in log format and host related options is specified, like HOSTFIRST, SNIFIRST, 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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47220.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-476"
    ]
}
References

Affected packages

Git / github.com/envoyproxy/envoy

Affected ranges

Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
6d9bb7d9a85d616b220d1f8fe67b61f82bbdb8d3
Fixed
f97695a50e11f5ff6719e129a466bf9204b64a7f
Introduced
f1dd21b16c244bda00edfb5ffce577e12d0d2ec2
Fixed
0ebfcfe5b0484b89ca85b761da9e05ce75dbda8d
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.37.0"
        },
        {
            "fixed": "1.37.5"
        },
        {
            "introduced": "1.38.0"
        },
        {
            "fixed": "1.38.3"
        }
    ]
}

Affected versions

v1.*
v1.37.0
v1.37.1
v1.37.2
v1.37.3
v1.37.4
v1.38.0
v1.38.1
v1.38.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47220.json"