CVE-2026-47220

See a problem?
Please try reporting it to the source first.
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
2026-06-26T18:02:17Z
Modified
2026-08-12T03:51:11Z
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 %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.

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

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"