{"answers":{"affected":"20 open source packages ship an affected version, including Microsoft.NETCore.App.Runtime.linux-x64, dotnet and dotnet-sdk. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-45491 in the wild and no public exploit code.","fix":"Upgrade Microsoft.NETCore.App.Runtime.linux-x64 to a fixed version for your release line: 10.0.9, 8.0.28 or 9.0.17.","what":"CVE-2026-45491 is a medium-severity path traversal vulnerability in Microsoft .Net, published on 9 Jun 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-2026-45491 and fix it if it is affected.\n\nWhat it is: CVE-2026-45491 is a medium-severity path traversal vulnerability in Microsoft .Net, published on 9 Jun 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-2026-45491 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): affected from 10.0.0; fixed in 10.0.9\n- Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): affected from 10.0.0; fixed in 10.0.9\n- Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): affected from 8.0.0; fixed in 8.0.28\n- Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): affected from 8.0.0; fixed in 8.0.28\n- Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): affected from 9.0.0; fixed in 9.0.17\n- Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): affected from 9.0.0; fixed in 9.0.17\n- dotnet (Bitnami): affected from 8.0.0; fixed in 8.0.28, 9.0.17, 10.0.9\n- dotnet-sdk (Bitnami): affected from 8.0.0; fixed in 8.0.28, 9.0.17, 10.0.9\n- Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.9\n- Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.9\n- Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet): affected from 8.0.0; fixed in 8.0.28\n- Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet): affected from 8.0.0; fixed in 8.0.28\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-2026-45491/ (Markdown: https://insights.sbomify.com/CVE-2026-45491/index.md)","id":"CVE-2026-45491","markdown":"https://insights.sbomify.com/CVE-2026-45491/index.md","name":"CVE-2026-45491","record":{"aliases":["BIT-dotnet-2026-45491","BIT-dotnet-sdk-2026-45491","GHSA-7q4v-2mr6-5gpx","MINI-p5mf-php4-hrgx","MINI-r6m4-rv2v-9xm8","UBUNTU-CVE-2026-45491"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":".NET runtime","requires_auth":"none","summary":"An attacker can tamper with files locally by exploiting improper link resolution in the .NET runtime.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":".net","vendor":"microsoft"}],"cvss":{"score":6.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"}],"description":"Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering 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 Tampering Vulnerability","id":"CVE-2026-45491","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"microsoft:.net","products":["microsoft:.net"],"type":"path_traversal","year":"2026"},"n_packages":20,"n_references":1,"next":{"headline":"Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability","id":"CVE-2026-45492"},"packages":[{"ecosystem":"Bitnami","fixed":["8.0.28","9.0.17","10.0.9"],"introduced":["8.0.0","9.0.0","10.0.0"],"last_affected":[],"package":"dotnet","purl":"pkg:bitnami/dotnet","source":"BIT-dotnet-2026-45491"},{"ecosystem":"Bitnami","fixed":["8.0.28","9.0.17","10.0.9"],"introduced":["8.0.0","9.0.0","10.0.0"],"last_affected":[],"package":"dotnet-sdk","purl":"pkg:bitnami/dotnet-sdk","source":"BIT-dotnet-sdk-2026-45491"},{"ecosystem":"NuGet","fixed":["10.0.9"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.linux-x64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["10.0.9"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.linux-x64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-x64","source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["8.0.28"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.linux-x64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["8.0.28"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.linux-x64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-x64","source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["9.0.17"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.linux-x64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["9.0.17"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.linux-x64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-x64","source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["10.0.9"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.osx-arm64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["10.0.9"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.osx-arm64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.osx-arm64","source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["8.0.28"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.osx-arm64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["8.0.28"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.osx-arm64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.osx-arm64","source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["9.0.17"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.osx-arm64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["9.0.17"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.osx-arm64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.osx-arm64","source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["10.0.9"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.win-x64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["10.0.9"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.win-x64","source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["8.0.28"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.win-x64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["8.0.28"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.win-x64","source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["9.0.17"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.win-x64","purl":null,"source":"GHSA-7q4v-2mr6-5gpx"},{"ecosystem":"NuGet","fixed":["9.0.17"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.NETCore.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.win-x64","source":"GHSA-7q4v-2mr6-5gpx"}],"prev":{"headline":".NET SDK Elevation of Privilege Vulnerability","id":"CVE-2026-45490"},"products":[".NET 10.0",".NET 8.0",".NET 9.0"],"published":"2026-06-09","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":"partial"},"state":"PUBLISHED","updated":"2026-09-24","vendors":["Microsoft"]},"summary":"An attacker can tamper with files locally by exploiting improper link resolution in the .NET runtime.","url":"https://insights.sbomify.com/CVE-2026-45491/"}