low3.7
CVE-2026-106449
yawkat LZ4 Java: LZ4BlockInputStream with stopOnEmptyBlock=false recurses once per empty block, causing StackOverflowError
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | at.yawk.lz4:lz4-java | <= 1.11.3 | 1.11.4 |
| maven | org.lz4:lz4-java | <= 1.8.1 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-343h-94h5-c4wr
- https://github.com/yawkat/lz4-java/security/advisories/GHSA-343h-94h5-c4wr
- https://nvd.nist.gov/vuln/detail/CVE-2026-106449
- https://github.com/yawkat/lz4-java/commit/c8ebf97d504fb34434fda46fc761e8202570e0d8
- https://github.com/yawkat/lz4-java/releases/tag/v1.11.4