{"id":"CVE-2026-49788","title":"HTTP/2 Denial of Service Vulnerability","summary":"Allocation of resources without limits or throttling in HTTP/2 allows an unauthorized attacker to deny service over a network.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-770"],"vendor":"Microsoft","product":"Windows 10 Version 1607","affected":["windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9339","windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9020","windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7548","windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7548","windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8875","windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8875","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2525","windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9339","windows_server_2016_server_core_installation >= 10.0.14393.0 < 10.0.14393.9339","windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9020","windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.9020","windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5386","windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33158","windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33158"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-07-14T17:32:41.774798Z"},"published":"2026-07-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T22:29:54.713Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49788","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49788","label":"HTTP/2 Denial of Service Vulnerability"}],"tags":["cve.org"],"epss":0.01174,"epssPercentile":0.65686,"ingestedAt":"2026-09-08T17:06:31.924Z","slug":"CVE-2026-49788","body":"## Overview\n\nAllocation of resources without limits or throttling in HTTP/2 allows an unauthorized attacker to deny service over a network.\n\n## Affected\n\n- `windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9339`\n- `windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9020`\n- `windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7548`\n- `windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7548`\n- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8875`\n- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8875`\n- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2525`\n- `windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9339`\n- `windows_server_2016_server_core_installation >= 10.0.14393.0 < 10.0.14393.9339`\n- `windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9020`\n- `windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.9020`\n- `windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5386`\n- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33158`\n- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33158`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}