{"answers":{"affected":"8 open source packages ship an affected version, including System.Security.Cryptography.Pkcs.","exploited":"There is no known exploitation of CVE-2026-84008 in the wild and no public exploit code.","fix":"Upgrade System.Security.Cryptography.Pkcs to a fixed version for your release line: 10.0.13, 11.0.0-rc.2, 8.0.2 or 9.0.21.","what":"CVE-2026-84008 is a high-severity denial of service vulnerability in Microsoft .NET Framework 3.5, published on 13 Oct 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-2026-84008 and fix it if it is affected.\n\nWhat it is: CVE-2026-84008 is a high-severity denial of service vulnerability in Microsoft .NET Framework 3.5, published on 13 Oct 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-2026-84008 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- System.Security.Cryptography.Pkcs (NuGet): affected from 10.0.0; fixed in 10.0.13\n- System.Security.Cryptography.Pkcs (NuGet): affected from 10.0.0; fixed in 10.0.13\n- System.Security.Cryptography.Pkcs (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2\n- System.Security.Cryptography.Pkcs (NuGet): affected from 11.0.0-preview.1; fixed in 11.0.0-rc.2\n- System.Security.Cryptography.Pkcs (NuGet): affected from 8.0.0; fixed in 8.0.2\n- System.Security.Cryptography.Pkcs (NuGet): affected from 8.0.0; fixed in 8.0.2\n- System.Security.Cryptography.Pkcs (NuGet): affected from 9.0.0; fixed in 9.0.21\n- System.Security.Cryptography.Pkcs (NuGet): affected from 9.0.0; fixed in 9.0.21\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-2026-84008/ (Markdown: https://insights.sbomify.com/CVE-2026-84008/index.md)","id":"CVE-2026-84008","markdown":"https://insights.sbomify.com/CVE-2026-84008/index.md","name":"CVE-2026-84008","record":{"aliases":["GHSA-846f-f764-76mx","MINI-77gc-3crv-8x5m","MINI-fm24-c5wp-cv9p","MINI-g76p-mfxr-ggxm","MINI-hq8w-rrjm-mp64","MINI-m38f-v26q-34j9","MINI-mxhp-hpv2-4rpv","MINI-qpg7-2cf2-gr4v","ROOT-APP-NUGET-CVE-2026-84008","UBUNTU-CVE-2026-84008"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":".NET Framework","requires_auth":"none","summary":"An attacker can cause a denial of service in .NET applications due to inefficient algorithmic complexity in cryptographic components.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[],"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-407","name":"Inefficient Algorithmic Complexity"}],"description":"Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service 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 Denial of Service Vulnerability","id":"CVE-2026-84008","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":8,"n_references":1,"next":{"headline":"Windows Projected File System Tampering Vulnerability","id":"CVE-2026-84009"},"packages":[{"ecosystem":"NuGet","fixed":["10.0.13"],"introduced":["10.0.0"],"last_affected":[],"package":"System.Security.Cryptography.Pkcs","purl":null,"source":"GHSA-846f-f764-76mx"},{"ecosystem":"NuGet","fixed":["10.0.13"],"introduced":["10.0.0"],"last_affected":[],"package":"System.Security.Cryptography.Pkcs","purl":"pkg:nuget/System.Security.Cryptography.Pkcs","source":"GHSA-846f-f764-76mx"},{"ecosystem":"NuGet","fixed":["11.0.0-rc.2"],"introduced":["11.0.0-preview.1"],"last_affected":[],"package":"System.Security.Cryptography.Pkcs","purl":null,"source":"GHSA-846f-f764-76mx"},{"ecosystem":"NuGet","fixed":["11.0.0-rc.2"],"introduced":["11.0.0-preview.1"],"last_affected":[],"package":"System.Security.Cryptography.Pkcs","purl":"pkg:nuget/System.Security.Cryptography.Pkcs","source":"GHSA-846f-f764-76mx"},{"ecosystem":"NuGet","fixed":["8.0.2"],"introduced":["8.0.0"],"last_affected":[],"package":"System.Security.Cryptography.Pkcs","purl":null,"source":"GHSA-846f-f764-76mx"},{"ecosystem":"NuGet","fixed":["8.0.2"],"introduced":["8.0.0"],"last_affected":[],"package":"System.Security.Cryptography.Pkcs","purl":"pkg:nuget/System.Security.Cryptography.Pkcs","source":"GHSA-846f-f764-76mx"},{"ecosystem":"NuGet","fixed":["9.0.21"],"introduced":["9.0.0"],"last_affected":[],"package":"System.Security.Cryptography.Pkcs","purl":null,"source":"GHSA-846f-f764-76mx"},{"ecosystem":"NuGet","fixed":["9.0.21"],"introduced":["9.0.0"],"last_affected":[],"package":"System.Security.Cryptography.Pkcs","purl":"pkg:nuget/System.Security.Cryptography.Pkcs","source":"GHSA-846f-f764-76mx"}],"prev":{"headline":"Remote Desktop Gateway Service Information Disclosure Vulnerability","id":"CVE-2026-84007"},"products":["Microsoft .NET Framework 3.5","Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2","Microsoft .NET Framework 3.5 AND 4.7.2","Microsoft .NET Framework 3.5 AND 4.8","Microsoft .NET Framework 3.5 AND 4.8.1","Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2","Microsoft .NET Framework 4.8","Microsoft .NET Framework 4.8.1","Microsoft Visual Studio 2022 version 17.14","Microsoft Visual Studio 2026 version 18.10","System.Security.Cryptography.Pkcs"],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["Microsoft"]},"summary":"An attacker can cause a denial of service in .NET applications due to inefficient algorithmic complexity in cryptographic components.","url":"https://insights.sbomify.com/CVE-2026-84008/"}