Vulnerability Description
Vim is an open source, command line text editor. Prior to 9.2.0735, the C omni-completion script in runtime/autoload/ccomplete.vim interpolates the typeref: or typename: extension field of a tags entry, without escaping, into a :vimgrep pattern that is run through :execute. Because :vimgrep honors the bar as a command separator, a crafted tag field can close the search pattern and append an arbitrary Ex command; opening a hostile .c file whose project tags file contains such an entry and invoking C omni-completion runs that command as the editing user. This issue is fixed in version 9.2.0735.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vim | Vim | < 9.2.0735 |
Related Weaknesses (CWE)
References
- https://github.com/vim/vim/commit/6b611b0d15603c52ebdad17172b0232b4f65704ePatch
- https://github.com/vim/vim/security/advisories/GHSA-mf92-v4xw-j45xPatchVendor Advisory
FAQ
What is CVE-2026-59858?
CVE-2026-59858 is a vulnerability with a CVSS score of 7.8 (HIGH). Vim is an open source, command line text editor. Prior to 9.2.0735, the C omni-completion script in runtime/autoload/ccomplete.vim interpolates the typeref: or typename: extension field of a tags entr...
How severe is CVE-2026-59858?
CVE-2026-59858 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59858?
Check the references section above for vendor advisories and patch information. Affected products include: Vim Vim.