CVE-2026-52860

Arbitrary code execution via Python omni-completion

Published Jun 11, 2026 · Updated Jun 11, 2026

Code injection in Vim before 9.2.0597 allows attackers to execute Python code through Python omni-completion in a hostile buffer. The python3complete.vim and pythoncomplete.vim scripts pass reconstructed definitions containing untrusted defaults, annotations, and class bases to exec(), which evaluates those expressions. Exploitation requires a build with Python support and a user to open the hostile buffer and invoke omni-completion; the code runs with that user's privileges.

CVSS severity7.5
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Vim before 9.2.0597 allows attackers to execute Python code through Python omni-completion in a hostile buffer. The python3complete.vim and pythoncomplete.vim scripts pass reconstructed definitions containing untrusted defaults, annotations, and class bases to exec(), which evaluates those expressions. Exploitation requires a build with Python support and a user to open the hostile buffer and invoke omni-completion; the code runs with that user's privileges.

The record

CVE
CVE-2026-52860
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-94, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 9.2.0597

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=< 9.2.0597

Published CVSS scores

8.0redhat-SADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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