CVE-2026-105794

Source
https://cve.org/CVERecord?id=CVE-2026-105794
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105794.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-105794
Aliases
Published
2026-10-06T14:14:54Z
Modified
2026-10-07T07:00:28Z
Severity
  • 9.1 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
MsQuic: Improper Certificate Validation in Microsoft.Native.Quic.MsQuic.OpenSSL
Details

MsQuic is a cross-platform C implementation of the IETF QUIC protocol exposed to C, C++, C#, and Rust. Prior to 2.4.20, 2.5.11, and 2.6.1, MsQuic clients using the OpenSSL or QuicTLS TLS backend do not properly verify that a server certificate matches the intended target server hostname. An on-path attacker can therefore present a certificate that does not match the intended target hostname and spoof the server in a man-in-the-middle attack. The Schannel backend is not affected. This issue is fixed in versions 2.4.20, 2.5.11, and 2.6.1.

Database specific
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-295"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105794.json"
}
References

Affected packages

Git / github.com/microsoft/msquic

Affected ranges

Type
GIT
Repo
https://github.com/microsoft/msquic
Events
Database specific
Show details
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.4.20"
        },
        {
            "introduced": "2.5.0"
        },
        {
            "fixed": "2.5.11"
        },
        {
            "introduced": "2.6.0"
        },
        {
            "fixed": "2.6.1"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.9-draft-23
v0.9-draft-24
v0.9-draft-25
v0.9-draft-27
v0.9-draft-28
v0.9-draft-29
v0.9.1-draft-30
v0.9.2-draft-31
v1.*
v1.2.0
v1.3.0
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.9.0
v2.*
v2.3.0
v2.4.1
v2.4.10
v2.4.11
v2.4.12
v2.4.13
v2.4.14
v2.4.15
v2.4.15-rc
v2.4.16
v2.4.17
v2.4.17-rc
v2.4.17-rc2
v2.4.18
v2.4.18-rc
v2.4.19
v2.4.19-rc
v2.4.2
v2.4.20-rc
v2.4.3
v2.4.4
v2.4.5
v2.4.7
v2.4.8
v2.4.9
v2.5.0
v2.5.1
v2.5.10
v2.5.10-rc
v2.5.11-rc
v2.5.2
v2.5.3
v2.5.4
v2.5.5
v2.5.6
v2.5.6-rc
v2.5.7
v2.5.7-rc
v2.5.7-rc2
v2.5.8
v2.5.8-rc
v2.5.9
v2.5.9-rc
v2.5.9-rc2
v2.6.0
v2.6.1-rc

Database specific

source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105794.json"
vanir_signatures
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]
vanir_signatures_modified
"2026-10-07T07:00:28Z"