yawkat lz4-java up to 1.11.3 LZ4BlockInputStream refill stopOnEmptyBlock stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.30

Summaryinfo

A vulnerability was found in yawkat lz4-java up to 1.11.3. It has been classified as problematic. The impacted element is the function refill of the component LZ4BlockInputStream. Performing a manipulation of the argument stopOnEmptyBlock results in stack-based overflow. This vulnerability is identified as CVE-2026-106449. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in yawkat lz4-java up to 1.11.3. This affects the function refill of the component LZ4BlockInputStream. The manipulation of the argument stopOnEmptyBlock with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-106449 since 10/06/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.11.4 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: lz4-java 1.11.4

Timelineinfo

10/06/2026 Advisory disclosed
10/06/2026 +0 days CVE reserved
10/06/2026 +0 days VulDB entry created
10/06/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-106449 (🔒)
GCVE (CVE): GCVE-0-2026-106449
GCVE (VulDB): GCVE-100-414531

Entryinfo

Created: 10/06/2026 22:16
Changes: 10/06/2026 22:16 (67)
Complete: 🔍
Cache ID: 216::103

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