CVE-2026-34714

Command execution via tabpanel modeline sandbox escape

Published Mar 30, 2026 · Updated Mar 30, 2026

OS command injection in Vim before 9.2.0272 allows attackers to execute commands when a local user opens a crafted file. A tabpanel modeline accepts a %{expr} string without the P_MLE gate, and autocmd_add() registers an autocommand without check_secure(), letting it fire after sandbox evaluation ends. The default modeline setting and standard +tabpanel builds are exposed; opening the file is the required user action, and commands run with the Vim process privileges.

CVSS severity9.2
Critical
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Vim before 9.2.0272 allows attackers to execute commands when a local user opens a crafted file. A tabpanel modeline accepts a %{expr} string without the P_MLE gate, and autocmd_add() registers an autocommand without check_secure(), letting it fire after sandbox evaluation ends. The default modeline setting and standard +tabpanel builds are exposed; opening the file is the required user action, and commands run with the Vim process privileges.

The record

CVE
CVE-2026-34714
Published
Mar 30, 2026
Updated
Mar 30, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-78, T1059, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 30, 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=0 <9.2.0272

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=0 <9.2.0272

Published CVSS scores

9.2MITRECVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
8.2VimCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
8.6NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
8.6Red HatCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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