{"answers":{"affected":"14 open source packages ship an affected version, including Microsoft.NetCore.App.Runtime.linux-arm, dotnet and dotnet-sdk. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-26131 in the wild and no public exploit code.","fix":"Upgrade Microsoft.NetCore.App.Runtime.linux-arm to 10.0.4 or later.","what":"CVE-2026-26131 is a high-severity vulnerability in Microsoft .Net, published on 10 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-26131 and fix it if it is affected.\n\nWhat it is: CVE-2026-26131 is a high-severity vulnerability in Microsoft .Net, published on 10 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-26131 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.NetCore.App.Runtime.linux-arm (NuGet): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-arm (NuGet): affected from 10.0.0; fixed in 10.0.4\n- dotnet (Bitnami): affected from 10.0.0; fixed in 10.0.4\n- dotnet-sdk (Bitnami): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-musl-arm (NuGet): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet): affected from 10.0.0; fixed in 10.0.4\n- Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet): affected from 10.0.0; fixed in 10.0.4\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-2026-26131/ (Markdown: https://insights.sbomify.com/CVE-2026-26131/index.md)","id":"CVE-2026-26131","markdown":"https://insights.sbomify.com/CVE-2026-26131/index.md","name":"CVE-2026-26131","record":{"aliases":["BIT-dotnet-2026-26131","BIT-dotnet-sdk-2026-26131","GHSA-crjq-wm6x-6qx7","UBUNTU-CVE-2026-26131"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":".NET runtime","requires_auth":"low_privilege","summary":"An authorized local attacker can elevate privileges due to incorrect default permissions in the .NET runtime.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":".net","vendor":"microsoft"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-276","name":"Incorrect Default Permissions"}],"description":"Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.","ecosystems":["Bitnami","NuGet"],"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":".NET Elevation of Privilege Vulnerability","id":"CVE-2026-26131","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"microsoft:.net","products":["microsoft:.net"],"type":"privilege_escalation","year":"2026"},"n_packages":14,"n_references":1,"next":{"headline":"Windows Kernel Elevation of Privilege Vulnerability","id":"CVE-2026-26132"},"packages":[{"ecosystem":"Bitnami","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"dotnet","purl":"pkg:bitnami/dotnet","source":"BIT-dotnet-2026-26131"},{"ecosystem":"Bitnami","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"dotnet-sdk","purl":"pkg:bitnami/dotnet-sdk","source":"BIT-dotnet-sdk-2026-26131"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-arm","purl":null,"source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-arm","purl":"pkg:nuget/Microsoft.NetCore.App.Runtime.linux-arm","source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-arm64","purl":null,"source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-arm64","purl":"pkg:nuget/Microsoft.NetCore.App.Runtime.linux-arm64","source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-musl-arm","purl":null,"source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-musl-arm","purl":"pkg:nuget/Microsoft.NetCore.App.Runtime.linux-musl-arm","source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-musl-arm64","purl":null,"source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-musl-arm64","purl":"pkg:nuget/Microsoft.NetCore.App.Runtime.linux-musl-arm64","source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-musl-x64","purl":null,"source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-musl-x64","purl":"pkg:nuget/Microsoft.NetCore.App.Runtime.linux-musl-x64","source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-x64","purl":null,"source":"GHSA-crjq-wm6x-6qx7"},{"ecosystem":"NuGet","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NetCore.App.Runtime.linux-x64","purl":"pkg:nuget/Microsoft.NetCore.App.Runtime.linux-x64","source":"GHSA-crjq-wm6x-6qx7"}],"prev":{"headline":"ASP.NET Core Denial of Service Vulnerability","id":"CVE-2026-26130"},"products":[".NET 10.0"],"published":"2026-03-10","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-19","vendors":["Microsoft"]},"summary":"An authorized local attacker can elevate privileges due to incorrect default permissions in the .NET runtime.","url":"https://insights.sbomify.com/CVE-2026-26131/"}