CVE-2026-49160 Details
Description
Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.
A denial-of-service vulnerability has been identified in the HTTP.sys component of Microsoft Windows, specifically in how HTTP/2 requests are handled. This vulnerability allows an unauthorized attacker to cause uncontrolled resource consumption, leading to a significant disruption of service over the network.
Users can install the June 2026 security updates for their specific Windows version to address this vulnerability. These updates include a new registry setting, MaxHeadersCount, which allows users to limit the number of headers in HTTP/2 and HTTP/3 requests that the server will accept. For more information, see Microsoft Knowledge Base article 5095051.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49160 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft windows 10 1607 | < 10.0.14393.9234 |
CPE
Remediation
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| microsoft windows 10 1809 | < 10.0.17763.8880 |
CPE
Remediation
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| microsoft windows 10 21h2 | < 10.0.19044.7417 |
CPE
Remediation
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| microsoft windows 10 22h2 | < 10.0.19045.7417 |
CPE
Remediation
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| microsoft windows 11 23h2 | < 10.0.22631.7219 |
CPE
Remediation
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| microsoft windows 11 24h2 | < 10.0.26100.8655 |
CPE
Remediation
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| microsoft windows 11 25h2 | < 10.0.26200.8655 |
CPE
Remediation
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| microsoft windows 11 26h1 | < 10.0.28000.2269 |
CPE
Remediation
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| microsoft windows server 2016 | < 10.0.14393.9234 |
CPE
Remediation
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| microsoft windows server 2019 | < 10.0.17763.8880 |
CPE
Remediation
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| microsoft windows server 2022 | < 10.0.20348.5256 |
CPE
Remediation
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| microsoft windows server 2025 | < 10.0.26100.32995 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 10, 2026 | Initial Analysis | [email protected] |
| Jun 9, 2026 | New CVE Received | [email protected] |