CVE-2026-66054Network attack vectorHinoki check available

Service interruption via unbounded compressed header frames

Published Oct 2, 2026 · Updated Oct 2, 2026

Resource exhaustion in Apache Thrift C++ bindings before 0.25.0 allows remote attackers to interrupt services via compressed RPC frames. THeaderTransport uses a hard-coded frame ceiling rather than the configured maximum, while a zlib transform can expand a small received frame into a much larger payload. Exposure requires a reachable C++ Thrift endpoint that accepts compressed header-transport messages; excessive decompression can exhaust process memory and interrupt that service.

CVSS severityUnavailable
Unscored
EPSS probability0.43%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource exhaustion in Apache Thrift C++ bindings before 0.25.0 allows remote attackers to interrupt services via compressed RPC frames. THeaderTransport uses a hard-coded frame ceiling rather than the configured maximum, while a zlib transform can expand a small received frame into a much larger payload. Exposure requires a reachable C++ Thrift endpoint that accepts compressed header-transport messages; excessive decompression can exhaust process memory and interrupt that service.

The record

CVE
CVE-2026-66054
Published
Oct 2, 2026
Updated
Oct 2, 2026
Vendor
Apache Software Foundation
Product
Apache Thrift
Classifications
T1499
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 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 <0.25.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Apache Software Foundation · Apache Thriftversion=0 <0.25.0

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
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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