{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-21517 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-21517 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-21517 is a medium-severity path traversal vulnerability in Microsoft Windows App for Mac, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-21517 and fix it if it is affected.\n\nWhat it is: CVE-2026-21517 is a medium-severity path traversal vulnerability in Microsoft Windows App for Mac, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-21517 in the wild and no public exploit code.\n\nAffected product: Microsoft Windows App for Mac. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-21517/ (Markdown: https://insights.sbomify.com/CVE-2026-21517/index.md)","id":"CVE-2026-21517","markdown":"https://insights.sbomify.com/CVE-2026-21517/index.md","name":"CVE-2026-21517","record":{"aliases":["GHSA-px7f-389h-299v"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Windows App for Mac","requires_auth":"low_privilege","summary":"An authorized local attacker can elevate privileges via improper link resolution in the Windows App for Mac installer.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"windows_app","vendor":"microsoft"}],"cvss":{"score":4.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"}],"description":"Improper link resolution before file access ('link following') in Windows App for Mac allows an authorized attacker to elevate privileges locally.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Windows App for Mac Installer Elevation of Privilege Vulnerability","id":"CVE-2026-21517","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability","id":"CVE-2026-21518"},"packages":[],"prev":{"headline":"GitHub Copilot for Jetbrains Remote Code Execution Vulnerability","id":"CVE-2026-21516"},"products":["Windows App for Mac"],"published":"2026-02-10","related":[{"cvss_score":9.8,"headline":"Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability","id":"CVE-2026-59124","kev_date_added":null,"published":"2026-08-11"},{"cvss_score":8.8,"headline":"Microsoft High Performance Computing (HPC) Pack Elevation of Privilege Vulnerability","id":"CVE-2026-59133","kev_date_added":null,"published":"2026-08-11"},{"cvss_score":7.8,"headline":"Privilege escalation in Microsoft Remote Desktop for Mac","id":"CVE-2020-0919","kev_date_added":null,"published":"2020-04-15"},{"cvss_score":6.5,"headline":"Windows App for Mac Information Disclosure Vulnerability","id":"CVE-2026-69550","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":5.9,"headline":"Windows App Installer Spoofing Vulnerability","id":"CVE-2026-23656","kev_date_added":null,"published":"2026-03-10"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-08-19","vendors":["Microsoft"]},"summary":"An authorized local attacker can elevate privileges via improper link resolution in the Windows App for Mac installer.","url":"https://insights.sbomify.com/CVE-2026-21517/"}