Memory Allocation Vulnerability in yawkat LZ4 for Java Software
CVE-2026-106450

5.3MEDIUM

Key Information:

Vendor

Yawkat

Status
Lz4-java
Vendor
CVE Published:
6 October 2026

What is CVE-2026-106450?

Yawkat LZ4 Java prior to version 1.11.4 contains a memory allocation vulnerability in the 'readHeader()' method of 'net.jpountz.lz4.LZ4FrameInputStream'. Attackers can exploit this by sending specially crafted streams with numerous minimal empty frames, leading to significant memory allocation (up to 8 MiB for every 11 input bytes) without producing any decompressed output. This not only consumes CPU cycles but also places heavy demand on garbage collection, potentially leading to denial of service conditions. The issue is resolved in version 1.11.4.

Affected Version(s)

lz4-java < 1.11.4

References

https://github.com/yawkat/lz4-java/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/yawkat/lz4-java/commit/2acc0ec1ead2261...
x_refsource_MISC
https://github.com/yawkat/lz4-java/releases/tag/v1.11.4
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.