{"answers":{"affected":"24 open source packages ship an affected version, including Microsoft.WindowsDesktop.App.Runtime.win-arm64, Microsoft.WindowsDesktop.App.Runtime.win-x64 and Microsoft.WindowsDesktop.App.Runtime.win-x86.","exploited":"There is no known exploitation of CVE-2026-87697 in the wild and no public exploit code.","fix":"Upgrade Microsoft.WindowsDesktop.App.Runtime.win-arm64 to a fixed version for your release line: 10.0.13, 11.0.0-rc.2, 8.0.32 or 9.0.21.","what":"CVE-2026-87697 is a high-severity unsafe deserialization vulnerability in Microsoft .NET 10.0 runtime, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-87697 and fix it if it is affected.\n\nWhat it is: CVE-2026-87697 is a high-severity unsafe deserialization vulnerability in Microsoft .NET 10.0 runtime, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-87697 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.13\n- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): affected from 10.0.0; fixed in 10.0.13\n- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2\n- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2\n- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): affected from 8.0.0; fixed in 8.0.32\n- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): affected from 8.0.0; fixed in 8.0.32\n- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): affected from 9.0.0; fixed in 9.0.21\n- Microsoft.WindowsDesktop.App.Runtime.win-arm64 (NuGet): affected from 9.0.0; fixed in 9.0.21\n- Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet): affected from 10.0.0; fixed in 10.0.13\n- Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet): affected from 10.0.0; fixed in 10.0.13\n- Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2\n- Microsoft.WindowsDesktop.App.Runtime.win-x64 (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2\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-2026-87697/ (Markdown: https://insights.sbomify.com/CVE-2026-87697/index.md)","id":"CVE-2026-87697","markdown":"https://insights.sbomify.com/CVE-2026-87697/index.md","name":"CVE-2026-87697","record":{"aliases":["GHSA-c27m-942f-rcfh","UBUNTU-CVE-2026-87697"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":".NET Framework","requires_auth":"none","summary":"An unauthorized attacker can execute arbitrary code over the network due to unsafe deserialization in .NET.","user_interaction":"required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.","ecosystems":["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 Remote Code Execution Vulnerability","id":"CVE-2026-87697","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":24,"n_references":1,"next":{"headline":"Windows Remote Access Service Infrastructure Information Disclosure Vulnerability","id":"CVE-2026-87698"},"packages":[{"ecosystem":"NuGet","fixed":["10.0.13"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["10.0.13"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-arm64","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["11.0.0-rc.2"],"introduced":["11.0.0-preview.1"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["11.0.0-rc.2"],"introduced":["11.0.0-preview.1"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-arm64","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["8.0.32"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["8.0.32"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-arm64","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["9.0.21"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["9.0.21"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-arm64","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["10.0.13"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x64","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["10.0.13"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-x64","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["11.0.0-rc.2"],"introduced":["11.0.0-preview.1"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x64","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["11.0.0-rc.2"],"introduced":["11.0.0-preview.1"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-x64","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["8.0.32"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x64","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["8.0.32"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-x64","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["9.0.21"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x64","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["9.0.21"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-x64","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["10.0.13"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x86","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["10.0.13"],"introduced":["10.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x86","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-x86","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["11.0.0-rc.2"],"introduced":["11.0.0-preview.1"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x86","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["11.0.0-rc.2"],"introduced":["11.0.0-preview.1"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x86","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-x86","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["8.0.32"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x86","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["8.0.32"],"introduced":["8.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x86","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-x86","source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["9.0.21"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x86","purl":null,"source":"GHSA-c27m-942f-rcfh"},{"ecosystem":"NuGet","fixed":["9.0.21"],"introduced":["9.0.0"],"last_affected":[],"package":"Microsoft.WindowsDesktop.App.Runtime.win-x86","purl":"pkg:nuget/Microsoft.WindowsDesktop.App.Runtime.win-x86","source":"GHSA-c27m-942f-rcfh"}],"prev":{"headline":"Microsoft Exchange Server Elevation of Privilege Vulnerability","id":"CVE-2026-87696"},"products":[".NET 10.0 runtime",".NET 11.0 runtime",".NET 8.0 runtime",".NET 9.0 runtime","Microsoft Visual Studio 2022 version 17.14","Microsoft Visual Studio 2026 version 18.10"],"published":"2026-10-13","related":[],"sources":[{"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":"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":"2026-10-29","vendors":["Microsoft"]},"summary":"An unauthorized attacker can execute arbitrary code over the network due to unsafe deserialization in .NET.","url":"https://insights.sbomify.com/CVE-2026-87697/"}