CVE-2026-105794: MsQuic: Improper Certificate Validation in Microsoft.Native.Quic.MsQuic.OpenSSL
Improper TLS hostname verification allows a man-in-the-middle (MITM) attack on MsQuic.
References
- github.com/advisories/GHSA-w5f4-fx9m-m4q7
- github.com/microsoft/msquic/commit/0591586443cc73a2d2cfb679527d91a144b4a412
- github.com/microsoft/msquic/commit/508e811370df93e2ad848f5c78347d4fe4f65a91
- github.com/microsoft/msquic/commit/90fd45498bf9b506b8556fb407088688474d6c81
- github.com/microsoft/msquic/commit/a01333cf7c2659cce0ff03ef3f21e1ff15bb5b83
- github.com/microsoft/msquic/pull/6274
- github.com/microsoft/msquic/pull/6275
- github.com/microsoft/msquic/pull/6276
- github.com/microsoft/msquic/pull/6277
- github.com/microsoft/msquic/releases/tag/v2.4.20
- github.com/microsoft/msquic/releases/tag/v2.5.11
- github.com/microsoft/msquic/releases/tag/v2.6.1
- github.com/microsoft/msquic/security/advisories/GHSA-w5f4-fx9m-m4q7
- nvd.nist.gov/vuln/detail/CVE-2026-105794
Code Behaviors & Features
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