{"id":"CVE-2026-109395","title":"Ning compress-lzf before 1.2.0 Out-of-Bounds Memory Access via UnsafeChunkDecoder","summary":"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 app…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cvssSource":"cna","cwe":["CWE-125"],"vendor":"ning","product":"compress-lzf","affected":["compress-lzf < 1.2.0"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T00:46:04.633Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109395","references":[{"url":"https://github.com/ning/compress/pull/68"},{"url":"https://github.com/ning/compress/commit/06bdc3744a96b736a7118891f403e44c664f108b"},{"url":"https://github.com/ning/compress/blob/compress-lzf-1.1.3/src/main/java/com/ning/compress/lzf/impl/UnsafeChunkDecoder.java#L104"},{"url":"https://github.com/github/securitylab/discussions/970"},{"url":"https://github.com/ning/compress"},{"url":"https://www.vulncheck.com/advisories/ning-compress-lzf-before-1.2.0-out-of-bounds-memory-access-via-unsafechunkdecoder","label":"VulnCheck Advisory: Ning compress-lzf before 1.2.0 Out-of-Bounds Memory Access via UnsafeChunkDecoder"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T01:49:42.629Z","slug":"CVE-2026-109395","body":"## Overview\n\nNing 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.\n\n## Affected\n\n- `compress-lzf < 1.2.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}