Vulnerability Description
Vim is an open source, command line text editor. Prior to 9.2.0736, the PHP omni-completion script in runtime/autoload/phpcomplete.vim interpolates a class or trait name, taken from the contents of the edited buffer, into a search() pattern that is run via win_execute() without escaping. A name containing a single quote can terminate the search() string argument early, and because the bar is honored as an Ex command separator, the remainder of the name is run as Ex commands; via the :! command this allows arbitrary operating-system command execution when a victim opens a crafted PHP file and invokes omni-completion. This issue is fixed in version 9.2.0736.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vim | Vim | < 9.2.0736 |
Related Weaknesses (CWE)
References
- https://github.com/vim/vim/commit/43afc581a37a35762dd0ef292f038b9dc5680a24Patch
- https://github.com/vim/vim/security/advisories/GHSA-fh26-8f79-wj97ExploitPatchVendor Advisory
FAQ
What is CVE-2026-59856?
CVE-2026-59856 is a vulnerability with a CVSS score of 7.8 (HIGH). Vim is an open source, command line text editor. Prior to 9.2.0736, the PHP omni-completion script in runtime/autoload/phpcomplete.vim interpolates a class or trait name, taken from the contents of th...
How severe is CVE-2026-59856?
CVE-2026-59856 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-2026-59856?
Check the references section above for vendor advisories and patch information. Affected products include: Vim Vim.