high · 7.5 Patched

snappy-java: Heap buffer overflow in Snappy.uncompress*Array typed-array methods

CVE-2026-93451 · GHSA-gwq9-9ffj-mvrv · published 27 Oct 2026

How serious is it

  • Severity: high, CVSS score 7.5 out of 10.
  • No exploit prediction (EPSS) score yet.
  • Not on the CISA list of exploited vulnerabilities.
  • No public exploit in Exploit-DB.

Is your app affected by CVE-2026-93451?

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Who is affected

  • org.xerial.snappy:snappy-java (Maven) <= 1.1.10.8

How to check

  1. Look for org.xerial.snappy:snappy-java in your lockfile and compare its version with the range above.
  2. Or paste your lockfile into the checker: it lists every package with a known vulnerability, this one included.

How to fix

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  1. Upgrade org.xerial.snappy:snappy-java to 1.1.10.9 or later, commit the lockfile and redeploy.
  2. If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

### Impact `Snappy.uncompressCharArray`, `uncompressShortArray`, `uncompressIntArray`, `uncompressLongArray`, `uncompressFloatArray` and `uncompressDoubleArray` sized the result array by dividing the declared uncompressed byte length by the element size, but native code wrote the full byte length. If the declared length is not a multiple of the element size, up to 7 bytes are written past the end of the Java array, corrupting the heap. ### Patches Fixed in 1.1.10.9 ([#739](https://github.com/xerial/snappy-java/pull/739)). These methods now reject uncompressed lengths that are not a multiple of the element size with `SnappyIOException`. ### Workarounds Check that `Snappy.uncompressedLength(input)` is a multiple of the element size before calling these methods.

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References

Merged from GitHub Advisory Database, OSV. Last updated 28 Oct 2026. All vulnerabilities · RSS · JSON

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