---
id: CVE-2026-106449
title: yawkat LZ4 Java provides LZ4 compression for Java
summary: >-
  yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4,
  net.jpountz.lz4.LZ4BlockInputStream configured with stopOnEmptyBlock set to
  false handles each well-formed empty LZ4Block by recursively calling refill(),
  allowing a lon…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-674
  - CWE-770
vendor: yawkat
product: lz4-java
affected:
  - lz4-java < 1.11.4
published: '2026-10-06'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T17:16:47.877'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106449'
references:
  - url: >-
      https://github.com/yawkat/lz4-java/commit/c8ebf97d504fb34434fda46fc761e8202570e0d8
    label: security-advisories@github.com
  - url: 'https://github.com/yawkat/lz4-java/releases/tag/v1.11.4'
    label: security-advisories@github.com
  - url: 'https://github.com/yawkat/lz4-java/security/advisories/GHSA-343h-94h5-c4wr'
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106449.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-106449'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2547101'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-106449'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106449'
  - url: 'https://github.com/advisories/GHSA-343h-94h5-c4wr'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - ghsa
  - maven
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-07T16:28:27.534978Z'
epss: 0.00423
epssPercentile: 0.36386
ingestedAt: '2026-10-06T20:16:42.480Z'
aliases:
  - GHSA-343h-94h5-c4wr
ecosystem: maven
patched:
  - 'at.yawk.lz4:lz4-java 1.11.4'
---

## Overview

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4BlockInputStream configured with stopOnEmptyBlock set to false handles each well-formed empty LZ4Block by recursively calling refill(), allowing a long sequence of empty blocks in an attacker-controlled compressed stream to exhaust the decoding thread's stack and throw StackOverflowError. The default stopOnEmptyBlock setting is true and is not affected, and the issue does not cause memory corruption. This issue is fixed in version 1.11.4.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Debezium 3, Red Hat Enterprise Linux 9, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, … · no fix planned: Red Hat Fuse 7, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Debezium 3, Red Hat Enterprise Linux 9, … · updated 2026-10-07 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106449.json)

## Package advisory (CVE-2026-106449)

Affected packages:

- `at.yawk.lz4:lz4-java <= 1.11.3`
- `org.lz4:lz4-java <= 1.8.1`

Patched in:

- `at.yawk.lz4:lz4-java 1.11.4`

Source: https://github.com/advisories/GHSA-343h-94h5-c4wr