High severity · published Jun 25, 2026
CVE-2026-57456
Vim: Arbitrary Code Execution via Python Omni-Completion Docstrings
7.8
CVSS
0.1%
EPSS
No
On KEV
Description
Vim is an open source, command line text editor. Prior to 9.2.0699, Vim's Python omni-completion (runtime/autoload/python3complete.vim and the legacy pythoncomplete.vim) executes reconstructed function and class definitions from the current buffer with exec() as part of populating the completion dictionary. When reconstructing that source, each scope's docstring is inserted verbatim between triple quotes with no escaping, so a hostile buffer can break out of the triple-quoted literal and execute attacker-controlled Python during omni-completion. This vulnerability is fixed in 9.2.0699.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vim · vim
< 9.2.0699 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57456
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57456
Patch
https://github.com/vim/vim/commit/cce141c42740f122dd8486ae04e21c2a81016ba8
Product
https://github.com/vim/vim/releases/tag/v9.2.0699
Vendor Advisory
https://github.com/vim/vim/security/advisories/GHSA-ppj8-wqjf-6fp3
More from vim
9.8
CVE-2020-20703
Buffer Overflow vulnerability in VIM v.8.1.2135 allows a remote attacker to execute arbitrary code via the operand parameter
9.8
CVE-2022-3520
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0765
9.8
CVE-2022-0318
Heap-based Buffer Overflow in vim/vim prior to 8.2
9.8
CVE-2017-6350
An integer overflow at an unserialize_uep memory allocation site would occur for vim before patch 8.0.0378, if it does not properly validate values for tree length when reading a…
9.8
CVE-2017-6349
An integer overflow at a u_read_undo memory allocation site would occur for vim before patch 8.0.0377, if it does not properly validate values for tree length when reading a…