---
title: "CVE-2026-106451: yawkat LZ4 Java - Race Condition & Native Code Execution"
description: "yawkat LZ4 Java 1.7.0 to 1.11.4 contains a race condition in native library loading caused by predictable temporary file paths, letting local attackers execute native code by replacing the library file, exploit requires shared temporary directory access."
url: https://panop.io/threat-heartbeat/CVE-2026-106451/
---

# CVE-2026-106451 yawkat LZ4 Java - Race Condition & Native Code Execution

yawkat LZ4 Java 1.7.0 to 1.11.4 contains a race condition in native library loading caused by predictable temporary file paths, letting local attackers execute native code by replacing the library file, exploit requires shared temporary directory access.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.08% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-106451)

## Details

Type

Race Condition

Impact

Remote Code Execution

CVSS vector

CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

6 October 2026

Updated

15 October 2026

Weakness

[CWE-367](https://cwe.mitre.org/data/definitions/367.html)

## Vendor fix

Update to version 1.11.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-106451](https://nvd.nist.gov/vuln/detail/CVE-2026-106451)
- [https://github.com/yawkat/lz4-java/commit/7a48b7f6b8099b9dab6541e4ac2ee0979dc55aa3](https://github.com/yawkat/lz4-java/commit/7a48b7f6b8099b9dab6541e4ac2ee0979dc55aa3)
- [https://github.com/yawkat/lz4-java/releases/tag/v1.11.4](https://github.com/yawkat/lz4-java/releases/tag/v1.11.4)
- [https://github.com/yawkat/lz4-java/security/advisories/GHSA-mcr4-qmvw-px4g](https://github.com/yawkat/lz4-java/security/advisories/GHSA-mcr4-qmvw-px4g)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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