MEDIUM 5.3 NVD
CVE-2026-106452
yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill() validates that the compressedLen field in a leg
yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill() validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data, allowing a header-only stream to request a near-2 GiB allocation and exhaust the JVM heap. Canonical writers emit raw blocks when compression is not smaller than the original block, but vulnerable readers accept non-canonical oversized compressed blocks. This issue is fixed in version 1.11.2.
References
- https://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634
- https://github.com/yawkat/lz4-java/releases/tag/v1.11.2
- https://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-10-06 via NVD.
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