CVE-2026-41196Network attack vector

Arbitrary code execution via leaked Lua environments

Published Apr 23, 2026 · Updated Apr 23, 2026

Code injection in Luanti 5.0.0 through 5.15.1 allows attackers controlling a malicious mod to execute arbitrary code outside LuaJIT sandboxes. The sandbox shallow-copies whitelisted library tables without rebinding copied functions to secure globals, while exposed getfenv reveals their original insecure environments. Exploitation requires LuaJIT and a malicious server-side, async, mapgen, or client-side mod, after which host files are fully accessible.

CVSS severity9.0
Critical
EPSS probability0.37%
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 Luanti 5.0.0 through 5.15.1 allows attackers controlling a malicious mod to execute arbitrary code outside LuaJIT sandboxes. The sandbox shallow-copies whitelisted library tables without rebinding copied functions to secure globals, while exposed getfenv reveals their original insecure environments. Exploitation requires LuaJIT and a malicious server-side, async, mapgen, or client-side mod, after which host files are fully accessible.

The record

CVE
CVE-2026-41196
Published
Apr 23, 2026
Updated
Apr 23, 2026
Vendor
Luanti
Product
Luanti
Classifications
CWE-94, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=>= 5.0.0, < 5.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Luanti · Luantiversion=>= 5.0.0, < 5.15.2

Published CVSS scores

10.0NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.0GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
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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