CVE-2026-46483

Shell command execution via archive filename expansion

Published May 15, 2026 · Updated May 15, 2026

Command injection in tar#Vimuntar() in Vim before 9.2.0479 allows attackers to execute shell commands through crafted .tgz filenames. The function passes the archive tail to :!gunzip and :!gzip -d after calling shellescape() without its special-character flag, so Vim expands cmdline-special characters before handing the command to the shell. Exploitation requires a Unix-like system with the tar plugin enabled and a local crafted archive that a user opens before manually invoking :Vimuntar.

CVSS severity3.6
Low
EPSS probability0.55%
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 tar#Vimuntar() in Vim before 9.2.0479 allows attackers to execute shell commands through crafted .tgz filenames. The function passes the archive tail to :!gunzip and :!gzip -d after calling shellescape() without its special-character flag, so Vim expands cmdline-special characters before handing the command to the shell. Exploitation requires a Unix-like system with the tar plugin enabled and a local crafted archive that a user opens before manually invoking :Vimuntar.

The record

CVE
CVE-2026-46483
Published
May 15, 2026
Updated
May 15, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-78, CWE-88, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 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=< 9.2.479

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=< 9.2.479

Published CVSS scores

3.6GitHubCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A: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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1203Exploitation for Client Execution

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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