CVE-2026-106449

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.

CVSS 3.1

3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWE

CWE-674

Published

2026-10-06

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Packages (OSV)

References

• https://github.com/yawkat/lz4-java/commit/c8ebf97d504fb34434fda46fc761e8202570e0d8
• https://github.com/yawkat/lz4-java/releases/tag/v1.11.4
• https://github.com/yawkat/lz4-java/security/advisories/GHSA-343h-94h5-c4wr

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