---
id: CVE-2026-90559
title: >-
  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
summary: >-
  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
  compress…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-787
vendor: xerial
product: snappy-java
affected:
  - snappy-java <= 1.1.10.8
published: '2026-09-12'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:28:01.780'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90559'
references:
  - url: 'https://github.com/xerial/snappy-java'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/xerial/snappy-java/blob/v1.1.10.8/src/main/java/org/xerial/snappy/Snappy.java#L561
    label: disclosure@vulncheck.com
  - url: 'https://github.com/xerial/snappy-java/issues/728'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/snappy-java-through-1.1.10.8-out-of-bounds-write-via-uncompress
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.0063
epssPercentile: 0.48052
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-14T17:06:13.362626Z'
ingestedAt: '2026-09-14T15:23:07.478Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.