CVE-2026-109395
CRITICAL
CVSS 9.1
Published: 2026-10-20
Modified: 2026-10-20
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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.
Quick Facts
| CVE ID | CVE-2026-109395 |
| CVSS Score | 9.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| Published | 2026-10-20 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- https://github.com/github/securitylab/discussions/970
- https://github.com/ning/compress
- https://github.com/ning/compress/blob/compress-lzf-1.1.3/src…
- https://github.com/ning/compress/commit/06bdc3744a96b736a711…
- https://github.com/ning/compress/pull/68
- https://www.vulncheck.com/advisories/ning-compress-lzf-befor…