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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-122"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25749.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:neovim:neovim:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "0.11.6"
}
],
"source": "CPE_RANGE"
}
]
}
{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "9.1.2132"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "0714b15940b245108e6e9d7aa2260dd849a26fa9"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v9.1.2132",
"range": [
{
"fixed": "0714b15940b245108e6e9d7aa2260dd849a26fa9"
}
],
"source": "REFERENCES_TAG"
},
{
"cpe": "cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "9.1.2132"
}
],
"source": "CPE_RANGE"
}
]
}