Attestkeep
Language: English
Sign up

Vulnerabilities / CVE-2026-105794

critical

CVE-2026-105794

MsQuic: Improper Certificate Validation in Microsoft.Native.Quic.MsQuic.OpenSSL

Published Modified CWE 295
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

GHSA9.1CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Trivy's own label is CRITICAL. Rated critical by GHSA.

Description

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.

Affected packages and fixed versions

SourcePackageFixed in
nuget::GitHub Security Advisory NuGetMicrosoft.Native.Quic.MsQuic.OpenSSL, microsoft.native.quic.msquic.openssl2.4.20, 2.5.11, 2.6.1
Show all 2 entries from 1 source
SourcePackageFixed in
nuget::GitHub Security Advisory NuGetMicrosoft.Native.Quic.MsQuic.OpenSSL2.4.20, 2.5.11, 2.6.1
nuget::GitHub Security Advisory NuGetmicrosoft.native.quic.msquic.openssl2.4.20, 2.5.11, 2.6.1

References

All 14 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.