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Response snapshot Oct 27, 2026, 16:01 UTC

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VulnerabilityCVE-2026-93451

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

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

At a glance

Exploited
Not known
Severity
7.5 High (CVSS 3.1)
Chance of exploitation
Not estimated
Sources
1 source

What to do

GitHub lists first patched versions: org.xerial.snappy:snappy-java: 1.1.10.9. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-gwq9-9ffj-mvrv (opens a new tab)

What happened

### 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.

Affected package ranges reported by GitHub: org.xerial.snappy:snappy-java: <= 1.1.10.8

Scores and how they were measured

CVSS base severity

7.5

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-gwq9-9ffj-mvrv (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-gwq9-9ffj-mvrv, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 27). snappy-java: Heap buffer overflow in Snappy.uncompress*Array typed-array methods (CVE-2026-93451). https://kevwire.com/record/CVE-2026-93451

MLA

"snappy-java: Heap buffer overflow in Snappy.uncompress*Array typed-array methods (CVE-2026-93451)." KEVWire, 27 Oct. 2026, kevwire.com/record/CVE-2026-93451.

Chicago

KEVWire. "snappy-java: Heap buffer overflow in Snappy.uncompress*Array typed-array methods (CVE-2026-93451)." Last modified October 27, 2026. https://kevwire.com/record/CVE-2026-93451.

Evidence summary (plain text)

snappy-java: Heap buffer overflow in Snappy.uncompress*Array typed-array methods (Oct 27, 2026).
snappy-java: Heap buffer overflow in Snappy.uncompress*Array typed-array methods
CVSS 7.5 (version 3.1; evidence as of Oct 27, 2026; https://github.com/advisories/GHSA-gwq9-9ffj-mvrv).
Sources:
GitHub-reviewed advisory GHSA-gwq9-9ffj-mvrv: https://github.com/advisories/GHSA-gwq9-9ffj-mvrv
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
Record ID: CVE-2026-93451.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 16:00 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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Record details

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