Is CVE-2026-106452 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-106452?

CVE-2026-106452 has a CVSS v3 severity of MEDIUM (5.3).

Back

CVE-2026-106452

Description

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.