RCE in Vim
CVE-2026-59856
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (11.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Vim — versions < 9.2.0736
Weakness classification (CWE)
References
- github.com/vim/vim/security/advisories/GHSA-fh26-8f79-wj97 (Exploit, Patch, Vendor Advisory)
- github.com/vim/vim/commit/43afc581a37a35762dd0ef292f038b9dc5680a24 (Patch)
Frequently asked questions
- What is CVE-2026-59856?
- CVE-2026-59856 is a high-severity vulnerability in Vim, classified under Code Injection. CVSS score: 7.8/10. Published 2026-07-09.
- How severe is CVE-2026-59856?
- High severity. CVSS v3 base score is 7.8 out of 10.