Buffer overflow in Xerial Snappy-Java
CVE-2026-90559
snappy-java through 1.1.10.8 contains an out-of-bounds write vulnerability in Snappy.uncompress(ByteBuffer, ByteBuffer) because destination buffer capacity is never validated against decompressed size. Attackers can supply valid compressed data that decompresses larger than the destination buffer, causing writes past buffer boundaries and JVM termination.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-90559?
- CVE-2026-90559 is a high-severity vulnerability in Xerial Snappy-Java, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-09-12.
- How severe is CVE-2026-90559?
- High severity. CVSS v3 base score is 7.5 out of 10.