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

Quick assessment

Affected
xerial snappy-java
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Taro L. Saito snappy-java是Taro L. Saito个人开发者开源的一个高效数据压缩与解压库。 Taro L. Saito snappy-java 1.1.10.8及之前版本存在缓冲区错误漏洞，该漏洞源于Snappy.uncompress(ByteBuffer, ByteBuffer)未验证目标缓冲区容量与解压后大小，可能导致越界写入并使JVM终止。

CVSS 7.5 · High EPSS 0.63% · P49

Affected Version Matrix 1

VendorProduct Version RangeStatus
xerial snappy-java ≤ 1.1.10.8 affected
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I. Basic Information for CVE-2026-90559

Vulnerability Information
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Vulnerability Title
snappy-java through 1.1.10.8 Out-of-Bounds Write via uncompress
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Taro L. Saito snappy-java 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Taro L. Saito snappy-java是Taro L. Saito个人开发者开源的一个高效数据压缩与解压库。 Taro L. Saito snappy-java 1.1.10.8及之前版本存在缓冲区错误漏洞，该漏洞源于Snappy.uncompress(ByteBuffer, ByteBuffer)未验证目标缓冲区容量与解压后大小，可能导致越界写入并使JVM终止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
xerial snappy-java 0 ~ 1.1.10.8 -

II. Public POCs for CVE-2026-90559

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III. Intelligence Information for CVE-2026-90559

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Vendor Advisories for CVE-2026-90559 (1)

Proof of Concept for CVE-2026-90559 (1)

Other References for CVE-2026-90559 (1)

IV. Related Vulnerabilities

Same product: snappy-java
Same vendor: xerial
Same weakness: CWE-787

V. Comments for CVE-2026-90559

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