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Vim CVE-2026-52860

| EUVDEUVD-2026-36285 HIGH
Code Injection (CWE-94)
2026-06-11 GitHub_M
Python Code Injection RCE Vim
7.5
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
7.5 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
7.8 HIGH

Exploitation requires the victim to open a local malicious file and actively invoke omni-completion, so AV:L and UI:R; no auth needed (PR:N) and full code execution gives C/I/A:H.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Red Hat
8.0 HIGH
qualitative

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
A
Scope
X

Lifecycle Timeline

3
Patch available
Jun 11, 2026 - 20:01 EUVD
Source Code Evidence Fetched
Jun 11, 2026 - 19:22 vuln.today
Analysis Generated
Jun 11, 2026 - 19:22 vuln.today

DescriptionCVE.org

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.

Articles & Coverage 1

News 6 New Python Vulnerabilities - 1 Critical, 5 High, 3 With POC Jun 12, 2026

AnalysisAI

Arbitrary Python code execution in Vim prior to 9.2.0597 occurs when a user triggers Python omni-completion (<C-x><C-o>) on a buffer containing crafted def or class headers, because the pythoncomplete autoload reconstructs definitions and runs them through exec(), which evaluates default values, annotations, and base-class expressions at definition time. The earlier g:pythoncomplete_allow_import mitigation (GHSA-52mc-rq6p-rc7c) does not cover this sink. No public exploit identified at time of analysis, and the issue is not listed in CISA KEV.

Technical ContextAI

The vulnerable code lives in Vim's runtime autoload scripts runtime/autoload/python3complete.vim and runtime/autoload/pythoncomplete.vim, which implement omni-completion for Python by parsing the current buffer and rebuilding stub def/class declarations that are then handed to Python's exec() to populate a completion dictionary. Because Python evaluates parameter default values, PEP 3107 annotations, and base-class expressions when a function or class statement is executed, any expression harvested from the buffer becomes attacker-controlled code at definition time. This is a CWE-94 (Improper Control of Generation of Code, 'Code Injection') flaw rooted in trusting buffer content as code rather than data; the CPE cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:* covers the upstream Vim editor for all platforms shipping these autoload scripts.

RemediationAI

Vendor-released patch: Vim 9.2.0597 - upgrade to this version or later (commit c8c63673bc4253212820626aeeb75999d9a539d2), which strips default values and annotations from parameters and whitelists base-class expressions to pure dotted names before calling exec(); see https://github.com/vim/vim/releases/tag/v9.2.0597 and the advisory at https://github.com/vim/vim/security/advisories/GHSA-65p9-mwwx-7468. If immediate upgrade is not possible, avoid triggering Python omni-completion (<C-x><C-o>) on untrusted buffers, disable the pythoncomplete/python3complete omnifunc for the python filetype (autocmd FileType python setlocal omnifunc=), or remove/replace the two autoload scripts with patched copies from the upstream commit; the trade-off is loss of Python completion functionality for that session. Note the prior g:pythoncomplete_allow_import setting does not mitigate this path and should not be relied upon.

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Same weakness CWE-94 – Code Injection

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Vendor StatusVendor

SUSE

Severity: Important
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CVE-2026-52860 vulnerability details – vuln.today
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