{"answers":{"affected":"8 open source packages ship an affected version, including Microsoft.AspNetCore.Authentication.Negotiate, dotnet and dotnet-sdk. It affects 3 products.","exploited":"There is no known exploitation of CVE-2026-47300 in the wild and no public exploit code.","fix":"Upgrade Microsoft.AspNetCore.Authentication.Negotiate to a fixed version for your release line: 10.0.10, 8.0.29 or 9.0.18.","what":"CVE-2026-47300 is a high-severity vulnerability in Microsoft .Net, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-47300 and fix it if it is affected.\n\nWhat it is: CVE-2026-47300 is a high-severity vulnerability in Microsoft .Net, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-47300 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.AspNetCore.Authentication.Negotiate (NuGet): affected from 10.0.0; fixed in 10.0.10\n- Microsoft.AspNetCore.Authentication.Negotiate (NuGet): affected from 10.0.0; fixed in 10.0.10\n- Microsoft.AspNetCore.Authentication.Negotiate (NuGet): affected from 8.0.0; fixed in 8.0.29\n- Microsoft.AspNetCore.Authentication.Negotiate (NuGet): affected from 8.0.0; fixed in 8.0.29\n- Microsoft.AspNetCore.Authentication.Negotiate (NuGet): affected from 9.0.0; fixed in 9.0.18\n- Microsoft.AspNetCore.Authentication.Negotiate (NuGet): affected from 9.0.0; fixed in 9.0.18\n- dotnet (Bitnami): affected from 8.0.0; fixed in 8.0.29, 9.0.18, 10.0.6\n- dotnet-sdk (Bitnami): affected from 8.0.0; fixed in 8.0.29, 9.0.18, 10.0.6\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-2026-47300/ (Markdown: https://insights.sbomify.com/CVE-2026-47300/index.md)","id":"CVE-2026-47300","markdown":"https://insights.sbomify.com/CVE-2026-47300/index.md","name":"CVE-2026-47300","record":{"aliases":["BIT-dotnet-2026-47300","BIT-dotnet-sdk-2026-47300","GHSA-8prm-248r-h957","MINI-85g3-wq47-p9v7","MINI-g587-frv6-h39h","UBUNTU-CVE-2026-47300"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"ASP.NET Core framework","requires_auth":"low_privilege","summary":"An authorized attacker can elevate privileges over the network due to an incorrect authentication algorithm implementation in ASP.NET Core.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":".net","vendor":"microsoft"},{"product":"visual_studio_2022","vendor":"microsoft"},{"product":"visual_studio_2026","vendor":"microsoft"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/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-303","name":"Incorrect Implementation of Authentication Algorithm"}],"description":"Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.","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":"ASP.NET Core Elevation of Privilege Vulnerability","id":"CVE-2026-47300","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"microsoft:.net","products":["microsoft:.net","microsoft:visual_studio_2022"],"type":"privilege_escalation","year":"2026"},"n_packages":8,"n_references":1,"next":{"headline":"Configuration Manager Elevation of Privilege Vulnerability","id":"CVE-2026-47301"},"packages":[{"ecosystem":"Bitnami","fixed":["8.0.29","9.0.18","10.0.6"],"introduced":["8.0.0","9.0.0","10.0.0"],"last_affected":[],"package":"dotnet","purl":"pkg:bitnami/dotnet","source":"BIT-dotnet-2026-47300"},{"ecosystem":"Bitnami","fixed":["8.0.29","9.0.18","10.0.6"],"introduced":["8.0.0","9.0.0","10.0.0"],"last_affected":[],"package":"dotnet-sdk","purl":"pkg:bitnami/dotnet-sdk","source":"BIT-dotnet-sdk-2026-47300"},{"ecosystem":"NuGet","fixed":["10.0.10"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Authentication.Negotiate","purl":null,"source":"GHSA-8prm-248r-h957"},{"ecosystem":"NuGet","fixed":["10.0.10"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Authentication.Negotiate","purl":"pkg:nuget/Microsoft.AspNetCore.Authentication.Negotiate","source":"GHSA-8prm-248r-h957"},{"ecosystem":"NuGet","fixed":["8.0.29"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Authentication.Negotiate","purl":null,"source":"GHSA-8prm-248r-h957"},{"ecosystem":"NuGet","fixed":["8.0.29"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Authentication.Negotiate","purl":"pkg:nuget/Microsoft.AspNetCore.Authentication.Negotiate","source":"GHSA-8prm-248r-h957"},{"ecosystem":"NuGet","fixed":["9.0.18"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Authentication.Negotiate","purl":null,"source":"GHSA-8prm-248r-h957"},{"ecosystem":"NuGet","fixed":["9.0.18"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Authentication.Negotiate","purl":"pkg:nuget/Microsoft.AspNetCore.Authentication.Negotiate","source":"GHSA-8prm-248r-h957"}],"prev":{"headline":"Azure Monitor Agent Elevation of Privilege Vulnerability","id":"CVE-2026-47299"},"products":[".NET 10.0 runtime",".NET 8.0 runtime",".NET 9.0 runtime","Microsoft Visual Studio 2022 version 17.12","Microsoft Visual Studio 2022 version 17.14","Microsoft Visual Studio 2026 version 18.7"],"published":"2026-07-14","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-2026-47303","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":"2026-10-28","vendors":["Microsoft"]},"summary":"An authorized attacker can elevate privileges over the network due to an incorrect authentication algorithm implementation in ASP.NET Core.","url":"https://insights.sbomify.com/CVE-2026-47300/"}