Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vim | Vim | < 9.1.2132 |
Related Weaknesses (CWE)
References
- https://github.com/vim/vim/commit/0714b15940b245108e6e9d7aa2260dd849a26fa9Patch
- https://github.com/vim/vim/releases/tag/v9.1.2132Product
- https://github.com/vim/vim/security/advisories/GHSA-5w93-4g67-mm43ExploitPatchVendor Advisory
FAQ
What is CVE-2026-25749?
CVE-2026-25749 is a vulnerability with a CVSS score of 6.6 (MEDIUM). 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 vu...
How severe is CVE-2026-25749?
CVE-2026-25749 has been rated MEDIUM with a CVSS base score of 6.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25749?
Check the references section above for vendor advisories and patch information. Affected products include: Vim Vim.