CVE-2026-55968Network attack vector

Server CPU exhaustion via repeated buffer concatenation

Published Jul 27, 2026 · Updated Jul 27, 2026

Algorithmic complexity in Apache Thrift Node.js bindings before 0.24.0 allows remote attackers to exhaust server CPU via partial requests. Server receive transports repeatedly concatenate arriving chunks with retained input, recopying the growing buffer and producing quadratic work. A network-exposed Node.js Thrift server accepting attacker-controlled streams can suffer prolonged CPU saturation without authentication.

CVSS severity8.7
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Algorithmic complexity in Apache Thrift Node.js bindings before 0.24.0 allows remote attackers to exhaust server CPU via partial requests. Server receive transports repeatedly concatenate arriving chunks with retained input, recopying the growing buffer and producing quadratic work. A network-exposed Node.js Thrift server accepting attacker-controlled streams can suffer prolonged CPU saturation without authentication.

The record

CVE
CVE-2026-55968
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
The Apache Software Foundation
Product
Apache Thrift
Classifications
CWE-407, CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 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 <0.24.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Thriftversion=0 <0.24.0

Published CVSS scores

8.7Apache Software FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5NIST National Vulnerability DatabaseCVSS: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.

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

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-407Inefficient Algorithmic Complexity
CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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