CVE-2026-47167Public exploit

Arbitrary command execution via unescaped Ruby regex

Published Jun 11, 2026 · Updated Jun 11, 2026

Code injection in Vim's cucumber filetype plugin before 9.2.0496 allows context-dependent attackers to execute commands via crafted step patterns. The s:stepmatch() function concatenates regex text from repository .rb files into a Ruby Kernel.eval expression without neutralizing a closing slash and appended statements. Execution requires a +ruby build, an attacker-controlled cucumber-style repository, and a user who invokes [d or ]d; commands run with that user's privileges.

CVSS severity5.1
Medium
EPSS probability0.14%
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's cucumber filetype plugin before 9.2.0496 allows context-dependent attackers to execute commands via crafted step patterns. The s:stepmatch() function concatenates regex text from repository .rb files into a Ruby Kernel.eval expression without neutralizing a closing slash and appended statements. Execution requires a +ruby build, an attacker-controlled cucumber-style repository, and a user who invokes [d or ]d; commands run with that user's privileges.

The record

CVE
CVE-2026-47167
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-94, CWE-95, T1204.002, T1059
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=< 9.2.0496

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=< 9.2.0496

Published CVSS scores

5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
5.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
T1204.002User Execution: Malicious File
T1059Command and Scripting Interpreter

Public exploit references

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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