CVE-2025-66566CWE-201

CVE-2025-66566

published December 5, 2025

CVSS
8.2
EPSS
1%
Percentile
48.3
In the wild
Unconfirmed
What it is

yawkat LZ4 Java provides LZ4 compression for Java. Insufficient clearing of the output buffer in Java-based decompressor implementations in lz4-java 1.10.0 and earlier allows remote attackers to read previous buffer contents via crafted compressed input. In applications where the output buffer is reused without being cleared, this may lead to disclosure of sensitive data. JNI-based implementations are not affected. This vulnerability is fixed in 1.10.1.

The record
Technical detail
CVSS
8.2 · NONE
CVSS v4.0
Not supplied
EPSS
0.00605 · 48.3th percentile
Weakness
CWE-201 · Insertion of Sensitive Information Into Sent Data
Published
2025-12-05T23:15Z
References (2)
https://github.com/yawkat/lz4-java/commit/33d180cb70c4d93c80fb0dc3ab3002f457e93840 · [email protected]https://github.com/yawkat/lz4-java/security/advisories/GHSA-cmp6-m4wj-q63q · [email protected]
EPSS history
Timeline
  • 05 DEC 18:10Z
    yawkat LZ4 Java has a possible information leak in Java safe decompressor
    cvelistv5