What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-11 · updated 2026-09-17
• Weakness: CWE-94

Description

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 products

• vim/vim: before 9.2.0597 — fixed in 9.2.0597

How to fix

Upgrade to a fixed version: vim/vim 9.2.0597. Check the vendor advisory for mitigations.

References

• https://github.com/vim/vim/commit/c8c63673bc4253212820626aeeb75999d9a539d2
• https://github.com/vim/vim/releases/tag/v9.2.0597
• https://github.com/vim/vim/security/advisories/GHSA-52mc-rq6p-rc7c
• https://github.com/vim/vim/security/advisories/GHSA-65p9-mwwx-7468
• https://access.redhat.com/security/cve/CVE-2026-52860
• https://bugzilla.redhat.com/show_bug.cgi?id=2487987
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52860.json

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