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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00403.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/github/securitylab/discussions/970 cve-icon cve-icon
https://github.com/ning/compress cve-icon cve-icon
https://github.com/ning/compress/blob/compress-lzf-1.1.3/src/main/java/com/ning/compress/lzf/impl/UnsafeChunkDecoder.java#L104 cve-icon cve-icon
https://github.com/ning/compress/commit/06bdc3744a96b736a7118891f403e44c664f108b cve-icon cve-icon
https://github.com/ning/compress/pull/68 cve-icon cve-icon
https://www.vulncheck.com/advisories/ning-compress-lzf-before-1.2.0-out-of-bounds-memory-access-via-unsafechunkdecoder cve-icon cve-icon
History

Tue, 20 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 20 Oct 2026 01:15:00 +0000

Type Values Removed Values Added
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.
Title Ning compress-lzf before 1.2.0 Out-of-Bounds Memory Access via UnsafeChunkDecoder
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'}

cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-20T14:29:50.505Z

Reserved: 2026-10-12T14:40:43.306Z

Link: CVE-2026-109395

cve-icon Vulnrichment

Updated: 2026-10-20T14:29:47.260Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T01:17:09.957

Modified: 2026-10-20T20:06:37.150

Link: CVE-2026-109395

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T06:15:10Z

Weaknesses