{"answers":{"affected":"8 open source packages ship an affected version, including CefSharp.Common, CefSharp.WinForms and CefSharp.Wpf. It affects 1 product.","exploited":"Yes. Attackers have exploited CVE-2020-16017 in the wild since at least 3 Nov 2021.","fix":"Upgrade CefSharp.Common to 86.0.241 or later. US federal agencies must fix it by 3 May 2022.","what":"CVE-2020-16017 is a critical use after free vulnerability in Google Chrome, published on 8 Jan 2021. 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-2020-16017 and fix it if it is affected.\n\nWhat it is: CVE-2020-16017 is a critical use after free vulnerability in Google Chrome, published on 8 Jan 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: Yes. Attackers have exploited CVE-2020-16017 in the wild since at least 3 Nov 2021.\n\nAffected packages and fixed versions:\n- CefSharp.Common (NuGet): affected all versions; fixed in 86.0.241\n- CefSharp.Common (NuGet): affected all versions; fixed in 86.0.241\n- CefSharp.WinForms (NuGet): affected all versions; fixed in 86.0.241\n- CefSharp.WinForms (NuGet): affected all versions; fixed in 86.0.241\n- CefSharp.Wpf (NuGet): affected all versions; fixed in 86.0.241\n- CefSharp.Wpf (NuGet): affected all versions; fixed in 86.0.241\n- CefSharp.Wpf.HwndHost (NuGet): affected all versions; fixed in 86.0.241\n- CefSharp.Wpf.HwndHost (NuGet): affected all versions; fixed in 86.0.241\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-2020-16017/ (Markdown: https://insights.sbomify.com/CVE-2020-16017/index.md)","id":"CVE-2020-16017","markdown":"https://insights.sbomify.com/CVE-2020-16017/index.md","name":"CVE-2020-16017","record":{"aliases":["DEBIAN-CVE-2020-16017","GHSA-gvqv-779r-4jgp","UBUNTU-CVE-2020-16017"],"analysis":{"component_type":"browser","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Google Chrome","requires_auth":"none","summary":"A remote attacker with compromised renderer access can escape the sandbox via a crafted HTML page due to a use-after-free bug in Chrome.","user_interaction":"required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Chrome","cpe":[{"product":"chrome","vendor":"google"}],"cvss":{"score":9.6,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"Use after free in site isolation in Google Chrome prior to 86.0.4240.198 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.","ecosystems":["NuGet"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"exploited"},"has_fix":true,"headline":"Google Chrome Use-After-Free","id":"CVE-2020-16017","indexable":true,"kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","knownRansomwareCampaignUse":"Unknown","product":"Chrome","requiredAction":"Apply updates per vendor instructions.","vendorProject":"Google","vulnerabilityName":"Google Chrome Use-After-Free Vulnerability"},"kind":"cve","links":{"ecosystem":"NuGet","product":"google:chrome","products":["google:chrome"],"type":"use_after_free","year":"2020"},"n_packages":8,"n_references":2,"next":{"headline":"Use after free in Chrome","id":"CVE-2020-16018"},"packages":[{"ecosystem":"NuGet","fixed":["86.0.241"],"introduced":["0"],"last_affected":[],"package":"CefSharp.Common","purl":null,"source":"GHSA-gvqv-779r-4jgp"},{"ecosystem":"NuGet","fixed":["86.0.241"],"introduced":["0"],"last_affected":[],"package":"CefSharp.Common","purl":"pkg:nuget/CefSharp.Common","source":"GHSA-gvqv-779r-4jgp"},{"ecosystem":"NuGet","fixed":["86.0.241"],"introduced":["0"],"last_affected":[],"package":"CefSharp.WinForms","purl":null,"source":"GHSA-gvqv-779r-4jgp"},{"ecosystem":"NuGet","fixed":["86.0.241"],"introduced":["0"],"last_affected":[],"package":"CefSharp.WinForms","purl":"pkg:nuget/CefSharp.WinForms","source":"GHSA-gvqv-779r-4jgp"},{"ecosystem":"NuGet","fixed":["86.0.241"],"introduced":["0"],"last_affected":[],"package":"CefSharp.Wpf","purl":null,"source":"GHSA-gvqv-779r-4jgp"},{"ecosystem":"NuGet","fixed":["86.0.241"],"introduced":["0"],"last_affected":[],"package":"CefSharp.Wpf","purl":"pkg:nuget/CefSharp.Wpf","source":"GHSA-gvqv-779r-4jgp"},{"ecosystem":"NuGet","fixed":["86.0.241"],"introduced":["0"],"last_affected":[],"package":"CefSharp.Wpf.HwndHost","purl":null,"source":"GHSA-gvqv-779r-4jgp"},{"ecosystem":"NuGet","fixed":["86.0.241"],"introduced":["0"],"last_affected":[],"package":"CefSharp.Wpf.HwndHost","purl":"pkg:nuget/CefSharp.Wpf.HwndHost","source":"GHSA-gvqv-779r-4jgp"}],"prev":{"headline":"Other in Chrome","id":"CVE-2020-16016"},"products":["Chrome"],"published":"2021-01-08","related":[{"cvss_score":9.6,"headline":"Google Chromium GPU Heap Buffer Overflow","id":"CVE-2022-4135","kev_date_added":"2022-11-28","published":"2022-11-25"},{"cvss_score":9.6,"headline":"Google Chrome for Android UI Heap Buffer Overflow","id":"CVE-2020-16010","kev_date_added":"2021-11-03","published":"2020-11-03"},{"cvss_score":8.8,"headline":"Google Chromium V8 Out of Bounds Write","id":"CVE-2026-87491","kev_date_added":"2026-09-09","published":"2026-09-09"},{"cvss_score":8.8,"headline":"Google Chromium V8 Type Confusion","id":"CVE-2026-85046","kev_date_added":"2026-09-04","published":"2026-09-03"},{"cvss_score":8.8,"headline":"Google Chromium V8 Out-of-Bounds Read and Write","id":"CVE-2026-11645","kev_date_added":"2026-06-09","published":"2026-06-08"},{"cvss_score":8.8,"headline":"Google Dawn Use-After-Free","id":"CVE-2026-5281","kev_date_added":"2026-04-01","published":"2026-04-01"}],"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":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-10-21","vendors":["Google"]},"summary":"A remote attacker with compromised renderer access can escape the sandbox via a crafted HTML page due to a use-after-free bug in Chrome.","url":"https://insights.sbomify.com/CVE-2020-16017/"}