CVE-2026-64773Network attack vector

Host memory exhaustion via pre-connect buffering

Published Aug 20, 2026 · Updated Aug 20, 2026

Denial of service in Apple Container before 1.2.0 allows remote attackers to exhaust host memory via a published TCP port. The SocketForwarder ConnectHandler buffers client TCP data in memory while TCPForwarder waits for the backend container connection to complete, and the advisory states that this buffer had no size cap and no bounded wait. Exposure requires a container with a published TCP port reachable by attackers; successful abuse can drive sustained growth in the host forwarding process and interrupt service, with no published indication of direct code execution or data modification.

CVSS severityUnavailable
Unscored
EPSS probability0.32%
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 Apple Container before 1.2.0 allows remote attackers to exhaust host memory via a published TCP port. The SocketForwarder ConnectHandler buffers client TCP data in memory while TCPForwarder waits for the backend container connection to complete, and the advisory states that this buffer had no size cap and no bounded wait. Exposure requires a container with a published TCP port reachable by attackers; successful abuse can drive sustained growth in the host forwarding process and interrupt service, with no published indication of direct code execution or data modification.

The record

CVE
CVE-2026-64773
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Apple
Product
Container
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=0 <1.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · Containerversion=0 <1.2.0

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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