CVE-2026-49788

HIGH

Microsoft Windows HTTP/2 - Resource Allocation Denial of Service

Title source: manual
STIX 2.1

Description

Allocation of resources without limits or throttling in HTTP/2 allows an unauthorized attacker to deny service over a network.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
HTTP/2 Denial of Service Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49788

Scores

CVSS v3 7.5
EPSS 0.0078
EPSS Percentile 52.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (27)
Microsoft/Windows 10 Version 1607 10.0.14393.0 - 10.0.14393.9339
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.9020
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.7548
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7548
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8875
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8875
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2269
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2525
Microsoft/Windows Server 2016 10.0.14393.0 - 10.0.14393.9339
Microsoft/Windows Server 2016 (Server Core installation) 10.0.14393.0 - 10.0.14393.9339
... and 17 more
Published Jul 14, 2026
Tracked Since Jul 14, 2026