Vim: Arbitrary Code Execution via Python Omni-Completion
CVE-2026-52860

7.5HIGH

Key Information:

Vendor

Vim

Status
Vim
Vendor
CVE Published:
11 June 2026

What is CVE-2026-52860?

Vim is an open source, command line text editor. Prior to version 9.2.0597, Vim's Python omni-completion executes reconstructed function and class definitions from the current buffer with exec() as part of populating the completion dictionary. Python evaluates function default values, parameter annotations, and class base expressions at definition time, so a hostile buffer can execute attacker-controlled Python expressions during omni-completion. The existing g:pythoncomplete_allow_import mitigation (GHSA-52mc-rq6p-rc7c) does not cover this path, because the attacker-controlled code is not a harvested import/from statement. This issue has been patched in version 9.2.0597.

Affected Version(s)

vim < 9.2.0597

References

https://github.com/vim/vim/security/advisories/GHSA-65p9-...
x_refsource_CONFIRM
https://github.com/vim/vim/security/advisories/GHSA-52mc-...
x_refsource_MISC
https://github.com/vim/vim/commit/c8c63673bc4253212820626...
x_refsource_MISC

CVSS V4

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.