{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-45591: ASP.NET Core Denial of Service Vulnerability","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-45591","status":"final","version":"1","initial_release_date":"2026-06-09T17:05:29.575Z","current_release_date":"2026-06-16T18:18:07.262Z","revision_history":[{"date":"2026-06-09T17:05:29.575Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-45591 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-45591"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-45591"},{"category":"external","summary":"ASP.NET Core Denial of Service Vulnerability","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45591"}]},"product_tree":{"branches":[{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":".NET 10.0","branches":[{"category":"product_version_range","name":">=10.0.0 <10.0.9","product":{"name":"Microsoft .NET 10.0 >=10.0.0 <10.0.9","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:.net_10.0:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":".NET 8.0","branches":[{"category":"product_version_range","name":">=8.0.0 <8.0.28","product":{"name":"Microsoft .NET 8.0 >=8.0.0 <8.0.28","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:.net_8.0:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":".NET 9.0","branches":[{"category":"product_version_range","name":">=9.0.0 <9.0.17","product":{"name":"Microsoft .NET 9.0 >=9.0.0 <9.0.17","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:.net_9.0:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"ASP.NET Core 10.0","branches":[{"category":"product_version_range","name":">=10.0 <10.0.9","product":{"name":"Microsoft ASP.NET Core 10.0 >=10.0 <10.0.9","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:asp.net_core_10.0:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"ASP.NET Core 8.0","branches":[{"category":"product_version_range","name":">=8.0 <8.0.28","product":{"name":"Microsoft ASP.NET Core 8.0 >=8.0 <8.0.28","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:asp.net_core_8.0:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"ASP.NET Core 9.0","branches":[{"category":"product_version_range","name":">=9.0 <9.0.17","product":{"name":"Microsoft ASP.NET Core 9.0 >=9.0 <9.0.17","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:asp.net_core_9.0:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Microsoft Visual Studio 2026 version 18.6","branches":[{"category":"product_version_range","name":">=18.6.0 <18.6.3","product":{"name":"Microsoft Microsoft Visual Studio 2026 version 18.6 >=18.6.0 <18.6.3","product_id":"CSAFPID-7","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.6:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-45591","title":"ASP.NET Core Denial of Service Vulnerability","notes":[{"category":"description","text":"Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7"]},"scores":[{"cvss_v3":{"version":"3.1","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","baseScore":7.5,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 8.0.28, 9.0.17, 10.0.9, 18.6.3.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45591"}]}]}