CVE-2026-4745Network attack vector

Arbitrary code execution via Lua bytecode loading

Published Mar 24, 2026 · Updated Mar 24, 2026

Code injection in Denis Bakhvalov Performance Ninja allows remote attackers to execute arbitrary code via crafted Lua bytecode. The f_parser function treats a chunk beginning with the Lua signature as bytecode and passes it to luaU_undump without disabling untrusted bytecode loading. The lab must process an attacker-controlled Lua chunk; merely cloning the course repository does not expose a network service.

CVSS severityUnavailable
Unscored
EPSS probability0.29%
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 Denis Bakhvalov Performance Ninja allows remote attackers to execute arbitrary code via crafted Lua bytecode. The f_parser function treats a chunk beginning with the Lua signature as bytecode and passes it to luaU_undump without disabling untrusted bytecode loading. The lab must process an attacker-controlled Lua chunk; merely cloning the course repository does not expose a network service.

The record

CVE
CVE-2026-4745
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
Denis Bakhvalov
Product
Performance Ninja
Classifications
CWE-94, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Denis Bakhvalov · Performance Ninjaversion=0

Published CVSS scores

10.0Government Technology Agency of Singapore Cyber Security Group (GovTech CSG)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A

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)
Vectornetwork
Privilegesunauthenticated
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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