CVE-2026-109395 Ning compress-lzf before 1.2.0 Out-of-Bounds Memory Access via UnsafeChunkDecoder

High 8.8 Published 20 Oct 2026 Updated 20 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-109395?

CVE-2026-109395 is a high-severity vulnerability in ning compress-lzf, published on 20 Oct 2026.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2026-109395?

How do I fix CVE-2026-109395?

No fix has been published for CVE-2026-109395 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-109395 being exploited?

There is no known exploitation of CVE-2026-109395 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2026-109395, GHSA-7xjc-8h6q-2f5h, UBUNTU-CVE-2026-109395.