{"@odata.context":"https://api.msrc.microsoft.com/sug/v2.0/sugodata/v2.0/en-US/$metadata#vulnerability","@odata.count":1,"value":[{"id":"00000000-0000-0000-0000-000042d93c40","releaseDate":"2026-06-09T07:00:00-07:00","cveNumber":"CVE-2026-49160","cveTitle":"HTTP.sys Denial of Service Vulnerability","releaseNumber":"2026-Jun","vulnType":"Security Vulnerability","latestRevisionDate":"2026-06-09T07:00:00-07:00","description":"<p>Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.</p>\n","cweList":["CWE-400: Uncontrolled Resource Consumption"],"cweDetailsListForSearch":["cwe: CWE-400: Uncontrolled Resource Consumption","cweUrl: https://cwe.mitre.org/data/definitions/400.html"],"unformattedDescription":"Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.","mitreText":"CVE-2026-49160","mitreUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49160","publiclyDisclosed":"Yes","exploited":"No","latestSoftwareReleaseId":1,"latestSoftwareRelease":"Exploitation More Likely","olderSoftwareReleaseId":0,"denialOfService":"N/A","tag":"HTTP/2","issuingCna":"Microsoft","issuingCnaId":100000001,"severityId":100000001,"severity":"Important","impactId":100000001,"impact":"Denial of Service","langCode":"en-US","baseScore":"7.5","temporalScore":"6.5","vectorString":"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","vectorStringSource":"Microsoft","isMariner":false,"customerActionRequired":true,"customerActionRequiredId":1,"cweDetailsList":[{"keys":["cwe","cweUrl"],"values":["CWE-400: Uncontrolled Resource Consumption","https://cwe.mitre.org/data/definitions/400.html"]}],"articles":[{"title":"HTTP/2 Denial of Service Vulnerability","articleType":"100000000","description":"<p>Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.</p>\n","ordinal":10000},{"articleType":"FAQ","description":"<p><strong>What actions should I take to help protect my devices from this vulnerability?</strong></p>\n<p>Install the June 2026 Windows security updates listed in the Security Updates table. These updates enable the protections Microsoft released for this CVE.</p>\n<p>As part of these updates, Microsoft also introduced a new <strong>MaxHeadersCount</strong> registry setting. This setting allows you to limit the number of headers included in HTTP/2 and HTTP/3 requests that are accepted by the HTTP server. For more information, see <a href=\"https://support.microsoft.com/en-us/topic/084da156-7a99-4abf-b759-f973c35eded3\">KB5102602</a>.</p>\n","ordinal":10000}],"revisions":[{"cveNumber":"CVE-2026-49160","version":1,"revisionDate":"2026-06-09T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Information published.</p>\n","unformattedDescription":"Information published.","notificationNeeded":false,"notificationSent":false,"sourceId":"ea0135ad-a95f-f111-93fb-000d3afbc7d7"}]}]}