CVE-2023-35944

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Source
https://nvd.nist.gov/vuln/detail/CVE-2023-35944
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-35944.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-35944
Aliases
Published
2023-07-25T18:35:59.135Z
Modified
2025-12-20T02:53:32.625Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N CVSS Calculator
Summary
Envoy vulnerable to incorrect handling of HTTP requests and responses with mixed case schemes
Details

Envoy is an open source edge and service proxy designed for cloud-native applications. Envoy allows mixed-case schemes in HTTP/2, however, some internal scheme checks are case-sensitive. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, this can lead to the rejection of requests with mixed-case schemes such as htTp or htTps, or the bypassing of some requests such as https in unencrypted connections. With a fix in versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, Envoy will now lowercase scheme values by default, and change the internal scheme checks that were case-sensitive to be case-insensitive. There are no known workarounds for this issue.

Database specific 
{
    "cwe_ids": [
        "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/35xxx/CVE-2023-35944.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/envoyproxy/envoy

Affected ranges

Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
51964702956d64adcd1df6b8ea132e863fe78e74
Fixed
cfa32deca25ac57c2bbecdad72807a9b13493fc1
Database specific 
{
    "versions": [
        {
            "introduced": "1.26.0"
        },
        {
            "fixed": "1.26.4"
        }
    ]
}
Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
9184b84cd0dcb3a6c57eb44b177d91c70e1a0901
Fixed
7b2609e12147377b0420bfa4453762e377f218f3
Database specific 
{
    "versions": [
        {
            "introduced": "1.25.0"
        },
        {
            "fixed": "1.25.9"
        }
    ]
}
Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
15baf56003f33a07e0ab44f82f75a660040db438
Fixed
5adb03f52a6399fe5a31fdb603d5009d8d59cdb9
Database specific 
{
    "versions": [
        {
            "introduced": "1.24.0"
        },
        {
            "fixed": "1.24.10"
        }
    ]
}
Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9689bc57f80fe56dbb16a4e0d632cde5363d1811
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.23.12"
        }
    ]
}

Affected versions

v1.*

v1.0.0
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.13.0
v1.14.0
v1.15.0
v1.16.0
v1.17.0
v1.18.0
v1.18.1
v1.18.2
v1.19.0
v1.2.0
v1.20.0
v1.21.0
v1.22.0
v1.23.0
v1.23.1
v1.23.10
v1.23.11
v1.23.2
v1.23.3
v1.23.4
v1.23.5
v1.23.6
v1.23.7
v1.23.8
v1.23.9
v1.24.0
v1.24.1
v1.24.2
v1.24.3
v1.24.4
v1.24.5
v1.24.6
v1.24.7
v1.24.8
v1.24.9
v1.25.0
v1.25.1
v1.25.2
v1.25.3
v1.25.4
v1.25.5
v1.25.6
v1.25.7
v1.25.8
v1.26.0
v1.26.1
v1.26.2
v1.26.3
v1.3.0
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.9.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-35944.json"