{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-28421 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-28421 is a medium-severity memory corruption vulnerability in Vim Vim, published on 27 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-28421 and fix it if it is affected.\n\nWhat it is: CVE-2026-28421 is a medium-severity memory corruption vulnerability in Vim Vim, published on 27 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-28421 in the wild and no public exploit code.\n\nAffected product: Vim Vim. 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-2026-28421/ (Markdown: https://insights.sbomify.com/CVE-2026-28421/index.md)","id":"CVE-2026-28421","markdown":"https://insights.sbomify.com/CVE-2026-28421/index.md","name":"CVE-2026-28421","record":{"aliases":["ALPINE-CVE-2026-28421","AZL-78500","BELL-CVE-2026-28421","DEBIAN-CVE-2026-28421","ECHO-6c94-1f29-8634","GHSA-r2gw-2x48-jj5p","ROOT-OS-DEBIAN-11-CVE-2026-28421","ROOT-OS-DEBIAN-12-CVE-2026-28421"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Vim text editor","requires_auth":"none","summary":"A heap-buffer-overflow in Vim's swap file recovery allows attackers to cause a crash or potentially execute code via crafted swap files.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"vim","vendor":"vim"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"},{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. Both are caused by unvalidated fields read from crafted pointer blocks within a swap file. Version 9.2.0077 fixes the issue.","ecosystems":[],"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":"Vim has a heap-buffer-overflow and a segmentation fault","id":"CVE-2026-28421","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"vim:vim","products":["vim:vim"],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Vim has stack-buffer-overflow in build_stl_str_hl()","id":"CVE-2026-28422"},"packages":[],"prev":{"headline":"Vim has Heap-based Buffer Overflow and OOB Read in :terminal","id":"CVE-2026-28420"},"products":["vim"],"published":"2026-02-27","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2020-20703","kev_date_added":null,"published":"2023-06-20"},{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2017-6349","kev_date_added":null,"published":"2017-02-27"},{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2017-6350","kev_date_added":null,"published":"2017-02-27"},{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2017-5953","kev_date_added":null,"published":"2017-02-10"},{"cvss_score":9.3,"headline":"Command injection in n/a","id":"CVE-2008-3075","kev_date_added":null,"published":"2009-02-21"},{"cvss_score":9.3,"headline":"Command injection in n/a","id":"CVE-2008-3076","kev_date_added":null,"published":"2009-02-21"},{"cvss_score":9.3,"headline":"Command injection in n/a","id":"CVE-2008-6235","kev_date_added":null,"published":"2009-02-21"}],"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":"2026-05-28","vendors":["vim"]},"summary":"A heap-buffer-overflow in Vim's swap file recovery allows attackers to cause a crash or potentially execute code via crafted swap files.","url":"https://insights.sbomify.com/CVE-2026-28421/"}