CVE-2026-106449
Low
Description
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.
SeverityLow
CVSS3.7
Exploit probability—
ProductAt.yawk.lz4:lz4-java
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-674CWE-674
How to fix
Update
- at.yawk.lz4:lz4-java1.11.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| at.yawk.lz4:lz4-javaMaven | v < 1.11.4 | 1.11.4 |
| org.lz4:lz4-javaMaven | v ≤ 1.8.1 | — |
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