CVE-2026-44302Public exploitNetwork attack vector

Process hang via malformed framed-stream decompression

Published May 12, 2026 · Updated May 12, 2026

Denial of service in Brant Burnett Snappier before 1.3.1 allows remote attackers to hang a consuming process via malformed framed input. The SnappyStreamDecompressor.Decompress path repeatedly calls Crc32CAlgorithm.Append in a userspace busy loop instead of returning or throwing an exception. Reachability requires an application to decompress attacker-controlled Snappy framed bytes; one call burns a thread until the process is killed.

CVSS severity7.5
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Brant Burnett Snappier before 1.3.1 allows remote attackers to hang a consuming process via malformed framed input. The SnappyStreamDecompressor.Decompress path repeatedly calls Crc32CAlgorithm.Append in a userspace busy loop instead of returning or throwing an exception. Reachability requires an application to decompress attacker-controlled Snappy framed bytes; one call burns a thread until the process is killed.

The record

CVE
CVE-2026-44302
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Brant Burnett
Product
Snappier
Classifications
CWE-835, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Brant Burnett · Snappierversion=< 1.3.1

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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