{"id":"CVE-2026-25749","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-25749","generatedAt":"2026-10-28T00:18:05.777Z","title":"Prior to version 9.1.2132, a heap buffer overflow vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option.","description":"Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option. The vulnerability is located in the get_tagfname() function in src/tag.c. When processing help file tags, Vim copies the user-controlled 'helpfile' option value into a fixed-size heap buffer of MAXPATHL + 1 bytes (typically 4097 bytes) using an unsafe STRCPY() operation without any bounds checking. This issue has been patched in version 9.1.2132.","published":"2026-02-06T23:15:54.000Z","lastModified":"2026-06-17T10:25:10.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H"},"cwe":["CWE-122"],"affected":["neovim/neovim","vim/vim"],"epss":{"score":0.00266,"percentile":0.18367,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/vim/vim/commit/0714b15940b245108e6e9d7aa2260dd849a26fa9","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vim/vim/releases/tag/v9.1.2132","tags":["Product"],"source":"security-advisories@github.com"},{"url":"https://github.com/vim/vim/security/advisories/GHSA-5w93-4g67-mm43","tags":["Exploit","Patch","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-25749","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}