Vulnerability details
CVE-2025-66566
yawkat lz4-java
yawkat LZ4 Java has a possible information leak in Java safe decompressor
CVSS 4.0
8.2High
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.2High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| yawkat | lz4-java | < 1.10.1 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2025-12-05
- Last updated
- 2025-12-05
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.64%
Probability of exploitation in 30 days
51.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-201Insertion of Sensitive Information Into Sent Data