{"id":"CVE-2026-109395","published":"2026-10-20T01:17:09.957","lastModified":"2026-10-20T01:17:09.957","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.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cwes":["CWE-125"],"vendors":[],"products":[],"references":[{"url":"https://github.com/github/securitylab/discussions/970","tags":[]},{"url":"https://github.com/ning/compress","tags":[]},{"url":"https://github.com/ning/compress/blob/compress-lzf-1.1.3/src/main/java/com/ning/compress/lzf/impl/UnsafeChunkDecoder.java#L104","tags":[]},{"url":"https://github.com/ning/compress/commit/06bdc3744a96b736a7118891f403e44c664f108b","tags":[]},{"url":"https://github.com/ning/compress/pull/68","tags":[]},{"url":"https://www.vulncheck.com/advisories/ning-compress-lzf-before-1.2.0-out-of-bounds-memory-access-via-unsafechunkdecoder","tags":[]}],"exploitRefs":[{"url":"https://github.com/github/securitylab/discussions/970","tags":[]},{"url":"https://github.com/ning/compress","tags":[]},{"url":"https://github.com/ning/compress/blob/compress-lzf-1.1.3/src/main/java/com/ning/compress/lzf/impl/UnsafeChunkDecoder.java#L104","tags":[]},{"url":"https://github.com/ning/compress/commit/06bdc3744a96b736a7118891f403e44c664f108b","tags":[]},{"url":"https://github.com/ning/compress/pull/68","tags":[]}],"hasPoc":true,"ai":null}