CRITICAL

CVE-2026-109395

CVSS v3

9.1

CRITICAL

EPSS Score

—

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-109395 yet.

Full record on NVD

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published: 2026-10-20
Last Modified: 2026-10-20

Frequently asked questions

What is CVE-2026-109395?

Is CVE-2026-109395 actively exploited?

Active exploitation of CVE-2026-109395 has not been confirmed.

What is the CVSS score for CVE-2026-109395?

CVE-2026-109395 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

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