CVE-2026-90559: Xerial Snappy-Java

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Xerial Snappy-Java: up to and including 1.1.10.8

Published 2026-09-12. Last modified 2026-10-08.