{"id":"CVE-2026-56170","title":"ASP.NET Core Denial of Service Vulnerability","summary":"Allocation of resources without limits or throttling in ASP.NET Core 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":".NET 10.0","affected":[".net_10.0 >= 10.0.0 < 10.0.10",".net_8.0 >= 8.0.0 < 8.0.29",".net_9.0 >= 9.0.0 < 9.0.18"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-07-14T17:49:27.269476Z"},"published":"2026-07-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T22:29:13.532Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56170","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56170","label":"ASP.NET Core Denial of Service Vulnerability"},{"url":"https://github.com/dotnet/aspnetcore/security/advisories/GHSA-j8gr-8fp3-5q5h"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56170"},{"url":"https://github.com/dotnet/announcements/issues/424"},{"url":"https://github.com/dotnet/aspnetcore/discussions/67787"},{"url":"https://github.com/advisories/GHSA-j8gr-8fp3-5q5h"}],"tags":["cve.org","ghsa","nuget"],"epss":0.01008,"epssPercentile":0.61058,"aliases":["GHSA-j8gr-8fp3-5q5h"],"ecosystem":"nuget","patched":["Microsoft.AspNetCore.App.Runtime.linux-arm 10.0.6","Microsoft.AspNetCore.App.Runtime.linux-arm64 10.0.6","Microsoft.AspNetCore.App.Runtime.linux-musl-arm 10.0.6","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 10.0.6","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 10.0.6","Microsoft.AspNetCore.App.Runtime.linux-x64 10.0.6","Microsoft.AspNetCore.App.Runtime.osx-arm64 10.0.6","Microsoft.AspNetCore.App.Runtime.osx-x64 10.0.6","Microsoft.AspNetCore.App.Runtime.win-arm 10.0.6","Microsoft.AspNetCore.App.Runtime.win-arm64 10.0.6","Microsoft.AspNetCore.App.Runtime.win-x64 10.0.6","Microsoft.AspNetCore.App.Runtime.win-x86 10.0.6","Microsoft.AspNetCore.App.Runtime.linux-arm 9.0.15","Microsoft.AspNetCore.App.Runtime.linux-arm64 9.0.15","Microsoft.AspNetCore.App.Runtime.linux-musl-arm 9.0.15","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 9.0.15","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 9.0.15","Microsoft.AspNetCore.App.Runtime.linux-x64 9.0.15","Microsoft.AspNetCore.App.Runtime.osx-arm64 9.0.15","Microsoft.AspNetCore.App.Runtime.osx-x64 9.0.15","Microsoft.AspNetCore.App.Runtime.win-arm 9.0.15","Microsoft.AspNetCore.App.Runtime.win-arm64 9.0.15","Microsoft.AspNetCore.App.Runtime.win-x64 9.0.15","Microsoft.AspNetCore.App.Runtime.win-x86 9.0.15","Microsoft.AspNetCore.App.Runtime.linux-arm 8.0.26","Microsoft.AspNetCore.App.Runtime.linux-arm64 8.0.26","Microsoft.AspNetCore.App.Runtime.linux-musl-arm 8.0.26","Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 8.0.26","Microsoft.AspNetCore.App.Runtime.linux-musl-x64 8.0.26","Microsoft.AspNetCore.App.Runtime.linux-x64 8.0.26","Microsoft.AspNetCore.App.Runtime.osx-arm64 8.0.26","Microsoft.AspNetCore.App.Runtime.osx-x64 8.0.26","Microsoft.AspNetCore.App.Runtime.win-arm 8.0.26","Microsoft.AspNetCore.App.Runtime.win-arm64 8.0.26","Microsoft.AspNetCore.App.Runtime.win-x64 8.0.26","Microsoft.AspNetCore.App.Runtime.win-x86 8.0.26"],"ingestedAt":"2026-07-21T16:51:41.770Z","slug":"CVE-2026-56170","body":"## Overview\n\nAllocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.\n\n## Affected\n\n- `.net_10.0 >= 10.0.0 < 10.0.10`\n- `.net_8.0 >= 8.0.0 < 8.0.29`\n- `.net_9.0 >= 9.0.0 < 9.0.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-56170)\n\nAffected packages:\n\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.win-arm >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 10.0.0, <= 10.0.5`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.win-arm >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 9.0.0, <= 9.0.14`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.win-arm >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 >= 8.0.0, <= 8.0.25`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 >= 8.0.0, <= 8.0.25`\n\nPatched in:\n\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.win-arm 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 10.0.6`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.win-arm 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 9.0.15`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.linux-arm64 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.linux-musl-x64 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.linux-x64 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.osx-arm64 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.osx-x64 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.win-arm 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.win-arm64 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.win-x64 8.0.26`\n- `Microsoft.AspNetCore.App.Runtime.win-x86 8.0.26`\n\nSource: https://github.com/advisories/GHSA-j8gr-8fp3-5q5h","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}