Is CVE-2026-109395 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109395?

CVE-2026-109395 has a CVSS v3 severity of CRITICAL (9.1).

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CVE-2026-109395

Description

Ning compress-lzf before 1.2.0 contains an out-of-bounds memory access vulnerability in the sun.misc.Unsafe based UnsafeChunkDecoder that fails to validate back-references and literal runs. Attackers can supply crafted LZF streams to applications using the default LZFDecoder to leak unrelated JVM heap memory into decompressed output or crash the JVM.