Code Injection in Vim - CVE-2026-52858

Vulnerability identifier: #VU133142

CSH Severity: Medium

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-52858

CWE-ID: CWE-94

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to improper control of code generation in python omni-completion in python3complete.vim when processing a crafted Python file during omni-completion. A local user can place a crafted Python file with attacker-controlled import statements and a sibling package in the working directory to execute arbitrary code.

User interaction is required to invoke omni-completion with CTRL-X CTRL-O while editing the crafted Python file, and the issue affects builds with the Python interpreter enabled and filetype plugins active.

Vim
Ubuntu
openEuler
vim (Ubuntu package)
vim-filesystem
vim
vim-X11
vim-common
vim-debuginfo
vim-debugsource
vim-enhanced
vim-minimal

Install security update from vendor's website.

Vim - update to 9.2.0561
vim (Ubuntu package) - addressed in versions 2:7.4.052-1ubuntu3.1+esm29, 2:7.4.1689-3ubuntu1.5+esm35, 2:8.0.1453-1ubuntu1.13+esm20, 2:8.1.2269-1ubuntu5.32+esm8, 2:8.2.3995-1ubuntu2.32, 2:9.1.0016-1ubuntu7.16, 2:9.1.0967-1ubuntu6.7, 2:9.1.2141-1ubuntu4.5
vim-filesystem - addressed in versions 9.0-50, 9.0.2092-36
vim - addressed in versions 9.0-50, 9.0.2092-36
vim-X11 - addressed in versions 9.0-50, 9.0.2092-36
vim-common - addressed in versions 9.0-50, 9.0.2092-36
vim-debuginfo - addressed in versions 9.0-50, 9.0.2092-36
vim-debugsource - addressed in versions 9.0-50, 9.0.2092-36
vim-enhanced - addressed in versions 9.0-50, 9.0.2092-36
vim-minimal - addressed in versions 9.0-50, 9.0.2092-36

• https://github.com/vim/vim/security/advisories/GHSA-52mc-rq6p-rc7c
• https://github.com/vim/vim/commit/4b850457e12e1a678dd209f2868154f7553cbf8d

• Code Injection in Vim
• Ubuntu update for vim
• openEuler 24.03 LTS SP3 update for vim
• openEuler 24.03 LTS SP1 update for vim
• openEuler 22.03 LTS SP4 update for vim
• openEuler 20.03 LTS SP4 update for vim