{"answers":{"affected":"2 open source packages ship an affected version, including Microsoft.ChakraCore. It affects 5 products.","exploited":"There is no known exploitation of CVE-2021-42279 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-42279 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-42279 is a medium-severity memory corruption vulnerability in Microsoft Windows 10, published on 10 Nov 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-2021-42279 and fix it if it is affected.\n\nWhat it is: CVE-2021-42279 is a medium-severity memory corruption vulnerability in Microsoft Windows 10, published on 10 Nov 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: There is no known exploitation of CVE-2021-42279 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.ChakraCore (NuGet): affected all versions up to 1.11.24; no fix listed\n- Microsoft.ChakraCore (NuGet): affected all versions up to 1.11.24; no fix listed\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-2021-42279/ (Markdown: https://insights.sbomify.com/CVE-2021-42279/index.md)","id":"CVE-2021-42279","markdown":"https://insights.sbomify.com/CVE-2021-42279/index.md","name":"CVE-2021-42279","record":{"aliases":["GHSA-jgrp-6qqq-3284"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Windows Chakra Engine","requires_auth":"none","summary":"A memory corruption vulnerability in the Chakra scripting engine allows attackers to execute arbitrary code on affected Windows systems.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"windows_10","vendor":"microsoft"},{"product":"windows_11","vendor":"microsoft"},{"product":"windows_server_2016","vendor":"microsoft"},{"product":"windows_server_2019","vendor":"microsoft"},{"product":"windows_server_2022","vendor":"microsoft"}],"cvss":{"score":4.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"Chakra Scripting Engine Memory Corruption Vulnerability","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":false,"headline":"Chakra Scripting Engine Memory Corruption Vulnerability","id":"CVE-2021-42279","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":"microsoft:windows_10","products":["microsoft:windows_10","microsoft:windows_11","microsoft:windows_server_2016","microsoft:windows_server_2019","microsoft:windows_server_2022"],"type":"memory_corruption","year":"2021"},"n_packages":2,"n_references":1,"next":{"headline":"Windows Feedback Hub Elevation of Privilege Vulnerability","id":"CVE-2021-42280"},"packages":[{"ecosystem":"NuGet","fixed":[],"introduced":["0"],"last_affected":["1.11.24"],"package":"Microsoft.ChakraCore","purl":null,"source":"GHSA-jgrp-6qqq-3284"},{"ecosystem":"NuGet","fixed":[],"introduced":["0"],"last_affected":["1.11.24"],"package":"Microsoft.ChakraCore","purl":"pkg:nuget/Microsoft.ChakraCore","source":"GHSA-jgrp-6qqq-3284"}],"prev":{"headline":"Microsoft Active Directory Domain Services Privilege Escalation","id":"CVE-2021-42278"},"products":["ChakraCore","Windows 10 Version 1507","Windows 10 Version 1607","Windows 10 Version 1809","Windows 10 Version 1909","Windows 10 Version 2004","Windows 10 Version 20H2","Windows 10 Version 21H1","Windows 11 version 21H2","Windows Server 2016","Windows Server 2019","Windows Server 2022","Windows Server version 2004","Windows Server version 20H2"],"published":"2021-11-10","related":[{"cvss_score":8.8,"headline":"Microsoft Windows Adobe Type Manager Library Remote Code Execution","id":"CVE-2015-2426","kev_date_added":"2022-03-28","published":"2015-07-20"},{"cvss_score":6.6,"headline":"Microsoft Windows Mount Manager Privilege Escalation","id":"CVE-2015-1769","kev_date_added":"2022-05-25","published":"2015-08-15"},{"cvss_score":10,"headline":"Windows Hard Link Elevation of Privilege Vulnerability","id":"CVE-2020-1467","kev_date_added":null,"published":"2020-08-17"},{"cvss_score":9.9,"headline":"Windows TCP/IP Remote Code Execution Vulnerability","id":"CVE-2021-26424","kev_date_added":null,"published":"2021-08-12"},{"cvss_score":9.9,"headline":"Windows Hyper-V Remote Code Execution Vulnerability","id":"CVE-2021-28476","kev_date_added":null,"published":"2021-05-11"},{"cvss_score":9.9,"headline":"Windows Hyper-V Remote Code Execution Vulnerability","id":"CVE-2021-26867","kev_date_added":null,"published":"2021-03-11"},{"cvss_score":9.9,"headline":"Security feature bypass in Windows","id":"CVE-2019-1384","kev_date_added":null,"published":"2019-11-12"}],"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":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-19","vendors":["Microsoft"]},"summary":"A memory corruption vulnerability in the Chakra scripting engine allows attackers to execute arbitrary code on affected Windows systems.","url":"https://insights.sbomify.com/CVE-2021-42279/"}