CVE-2026-73073

Command execution via tags value in vimgrep

Published Aug 18, 2026 · Updated Aug 18, 2026

Command injection in Vim before 9.2.0845 allows attackers to execute Ex and operating-system commands via a crafted tags file. StructMembers() in runtime/autoload/ccomplete.vim builds and executes a :vimgrep command from typeref: or typename: data and escapes only / and , so an unclosed [ can break pattern parsing and a following | is parsed as a new Ex command. Exploitation requires a user to invoke C omni-completion with CTRL-X CTRL-O on member access resolved through the malicious tags entry, and the payload runs with that user's Vim and operating-system permissions.

CVSS severity7.1
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Vim before 9.2.0845 allows attackers to execute Ex and operating-system commands via a crafted tags file. StructMembers() in runtime/autoload/ccomplete.vim builds and executes a :vimgrep command from typeref: or typename: data and escapes only / and , so an unclosed [ can break pattern parsing and a following | is parsed as a new Ex command. Exploitation requires a user to invoke C omni-completion with CTRL-X CTRL-O on member access resolved through the malicious tags entry, and the payload runs with that user's Vim and operating-system permissions.

The record

CVE
CVE-2026-73073
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-94, CWE-829, T1059
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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=< 9.2.0845

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=< 9.2.0845

Published CVSS scores

7.1GitHub, Inc.CVSS:4.0/AV:L/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
CWE-829Inclusion of Functionality from Untrusted Control Sphere
T1059Command and Scripting Interpreter

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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