What’s Vulnerable › Vulnerabilities

CVE-2026-90559: snappy-java through 1.1.10.8 Out-of-Bounds Write via uncompress

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-12 · updated 2026-10-08
• Weakness: CWE-787

Description

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: through 1.1.10.8

References

• https://github.com/xerial/snappy-java
• https://github.com/xerial/snappy-java/blob/v1.1.10.8/src/main/java/org/xerial/snappy/Snappy.java#L561
• https://github.com/xerial/snappy-java/issues/728
• https://www.vulncheck.com/advisories/snappy-java-through-1.1.10.8-out-of-bounds-write-via-uncompress

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