CVE-2026-33096 HTTP.sys Denial of Service Vulnerability

High 7.5 Published 14 Apr 2026 Updated 15 Oct 2026

An out-of-bounds read in Windows HTTP.sys allows unauthorized attackers to cause a denial of service over the network.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-33096?

CVE-2026-33096 is a high-severity denial of service vulnerability in Microsoft Windows 11 23h2, published on 14 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.

Weakness: CWE-125

Which versions are affected by CVE-2026-33096?

It affects 7 products.

Products include Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2 and 1 more.

How do I fix CVE-2026-33096?

No fix has been published for CVE-2026-33096 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-33096 being exploited?

There is no known exploitation of CVE-2026-33096 in the wild and no public exploit code.

All Microsoft Windows 11 23h2 vulnerabilities

Sources

Also known as GHSA-8cm7-r3pw-h7fx.