CVE-2026-93451: snappy-java buffer overflow in Snappy.uncompress*Array

CVE-2026-93451 · Severity: high · CVSS 7.5 · Published 2026-09-18

snappy-java is a Java library that compresses and decompresses data using the Snappy algorithm, commonly embedded in data processing applications. A buffer overflow vulnerability in versions through 1.1.10.8 allows attackers who control compressed input to write past array boundaries and corrupt heap memory, potentially leading to application crashes or data corruption.

Technologies: org.xerial.snappy:snappy-java (Maven), Xerial Snappy-Java. Vendors: Maven, Xerial.

Quick answers

Is CVE-2026-93451 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-93451 being exploited in the wild.
How severe is CVE-2026-93451?
High severity, with a CVSS score of 7.5, published 18 September 2026.
Which products and versions are affected?
org.xerial.snappy:snappy-java (Maven) <= 1.1.10.8, ECOSYSTEM:introduced=0,fixed=1.1.10.9; Xerial Snappy-Java through 1.1.10.8.
Is there a fix for CVE-2026-93451?
Yes. org.xerial.snappy:snappy-java (Maven): upgrade to 1.1.10.9 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-93451 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-93451?
Check whether you run org.xerial.snappy:snappy-java (Maven) or Xerial Snappy-Java at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • org.xerial.snappy:snappy-java (Maven): upgrade to 1.1.10.9 or later
    # set org.xerial.snappy:snappy-java to 1.1.10.9 in your pom.xml or build.gradle

Technical details

The vulnerability exists in the typed Snappy.uncompress*Array methods, which allocate output arrays by dividing the uncompressed length by element size but then pass the undivided length to native code. This mismatch causes a buffer overflow when decompressing attacker-controlled compressed data. The root cause is improper handling of array allocation size calculations in the Java-to-native boundary. An attacker can craft malicious compressed input to write attacker-controlled bytes past array bounds, corrupting heap memory. The vulnerability does not require authentication but requires the ability to control compressed input fed to the uncompress methods.

Affected products

  • Xerial snappy-java through 1.1.10.8

Identifiers

  • CVE-2026-93451
  • GHSA-gwq9-9ffj-mvrv

Timeline

  • 2026-09-18: disclosed

References

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