{"answers":{"affected":"40 open source packages ship an affected version, including Microsoft.AspNetCore.App.Runtime.linux-arm, dotnet and dotnet-sdk. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-42899 in the wild and no public exploit code.","fix":"Upgrade Microsoft.AspNetCore.App.Runtime.linux-arm to a fixed version for your release line: 10.0.8, 8.0.27 or 9.0.16.","what":"CVE-2026-42899 is a high-severity denial of service vulnerability in Microsoft .Net, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-42899 and fix it if it is affected.\n\nWhat it is: CVE-2026-42899 is a high-severity denial of service vulnerability in Microsoft .Net, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-42899 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 10.0.0; fixed in 10.0.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 10.0.0; fixed in 10.0.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 8.0.0; fixed in 8.0.27\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 8.0.0; fixed in 8.0.27\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 9.0.0; fixed in 9.0.16\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 9.0.0; fixed in 9.0.16\n- dotnet (Bitnami): affected from 8.0.0; fixed in 8.0.27, 9.0.16, 10.0.8\n- dotnet-sdk (Bitnami): affected from 8.0.0; fixed in 8.0.27, 9.0.16, 10.0.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 8.0.0; fixed in 8.0.27\n- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 8.0.0; fixed in 8.0.27\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-42899/ (Markdown: https://insights.sbomify.com/CVE-2026-42899/index.md)","id":"CVE-2026-42899","markdown":"https://insights.sbomify.com/CVE-2026-42899/index.md","name":"CVE-2026-42899","record":{"aliases":["ALSA-2026:21294","ALSA-2026:21295","ALSA-2026:21296","ALSA-2026:21297","ALSA-2026:21754","ALSA-2026:22145","BELL-CVE-2026-42899","BIT-dotnet-2026-42899","BIT-dotnet-sdk-2026-42899","GHSA-9v76-4qcc-frgh","MINI-c2jg-jfwh-v3vw","MINI-c7xj-5p44-g25h","RHSA-2026:17464","RHSA-2026:21294","RHSA-2026:21295","RHSA-2026:21296","RHSA-2026:21297","RHSA-2026:21754","RHSA-2026:22145","RHSA-2026:24333","RHSA-2026:24336","RLSA-2026:21294","RLSA-2026:21295","RLSA-2026:21296","RLSA-2026:21297","RLSA-2026:21754","RLSA-2026:22145","UBUNTU-CVE-2026-42899","USN-8298-1"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"ASP.NET Core","requires_auth":"none","summary":"An unauthorized attacker can cause a denial of service in ASP.NET Core via an infinite loop, requiring a patch.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":".net","vendor":"microsoft"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"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","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"}],"description":"Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.","ecosystems":["AlmaLinux:10","AlmaLinux:8","AlmaLinux:9","Bitnami","NuGet","Red Hat:enterprise_linux:10.2","Red Hat:enterprise_linux:8::appstream","Red Hat:enterprise_linux:8::crb","Red Hat:enterprise_linux:9::appstream","Red Hat:enterprise_linux:9::crb","Red Hat:enterprise_linux_eus:10.0","Red Hat:hummingbird:1","Red Hat:rhel_eus:9.6::appstream","Red Hat:rhel_eus:9.6::crb","Rocky Linux:10","Rocky Linux:8","Rocky Linux:9"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ASP.NET Core Denial of Service Vulnerability","id":"CVE-2026-42899","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"microsoft:.net","products":["microsoft:.net"],"type":"denial_of_service","year":"2026"},"n_packages":385,"n_references":1,"next":{"headline":"Microsoft Windows App Store Elevation of Privilege Vulnerability","id":"CVE-2026-42900"},"packages":[{"ecosystem":"Bitnami","fixed":["8.0.27","9.0.16","10.0.8"],"introduced":["8.0.0","9.0.0","10.0.0"],"last_affected":[],"package":"dotnet","purl":"pkg:bitnami/dotnet","source":"BIT-dotnet-2026-42899"},{"ecosystem":"Bitnami","fixed":["8.0.27","9.0.16","10.0.8"],"introduced":["8.0.0","9.0.0","10.0.0"],"last_affected":[],"package":"dotnet-sdk","purl":"pkg:bitnami/dotnet-sdk","source":"BIT-dotnet-sdk-2026-42899"},{"ecosystem":"NuGet","fixed":["10.0.8"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["10.0.8"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["8.0.27"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["8.0.27"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["9.0.16"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["9.0.16"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["10.0.8"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["10.0.8"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["8.0.27"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["8.0.27"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["9.0.16"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["9.0.16"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["10.0.8"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["10.0.8"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["8.0.27"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["8.0.27"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["9.0.16"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["9.0.16"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["10.0.8"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm64","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["10.0.8"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64","source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["8.0.27"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm64","purl":null,"source":"GHSA-9v76-4qcc-frgh"},{"ecosystem":"NuGet","fixed":["8.0.27"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-a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Dynamics 365 On-Premises Remote Code Execution Vulnerability","id":"CVE-2026-42898"},"products":[".NET 10.0",".NET 8.0",".NET 9.0"],"published":"2026-05-12","related":[{"cvss_score":9.8,"headline":".NET and Visual Studio Remote Code Execution Vulnerability","id":"CVE-2024-43498","kev_date_added":null,"published":"2024-11-12"},{"cvss_score":9.1,"headline":"NET, .NET Framework, and Visual Studio Security Feature Bypass Vulnerability","id":"CVE-2024-0057","kev_date_added":null,"published":"2024-01-09"},{"cvss_score":8.8,"headline":".NET Security Feature Bypass Vulnerability","id":"CVE-2026-96957","kev_date_added":null,"published":"2026-10-13"},{"cvss_score":8.8,"headline":".NET and Visual Studio Elevation of Privilege Vulnerability","id":"CVE-2026-69439","kev_date_added":null,"published":"2026-09-08"},{"cvss_score":8.8,"headline":".NET and Visual Studio Remote Code Execution Vulnerability","id":"CVE-2026-71328","kev_date_added":null,"published":"2026-09-08"},{"cvss_score":8.8,"headline":"ASP.NET Core Elevation of Privilege Vulnerability","id":"CVE-2026-47300","kev_date_added":null,"published":"2026-07-14"},{"cvss_score":8.8,"headline":"ASP.NET Core Elevation of Privilege Vulnerability","id":"CVE-2026-47303","kev_date_added":null,"published":"2026-07-14"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-10","vendors":["Microsoft"]},"summary":"An unauthorized attacker can cause a denial of service in ASP.NET Core via an infinite loop, requiring a patch.","url":"https://insights.sbomify.com/CVE-2026-42899/"}