CVE-2026-44890Network attack vector

Service interruption via unbounded RESP length buffering

Published Jun 11, 2026 · Updated Jun 11, 2026

Uncontrolled resource consumption in Netty 4.1.134.Final and earlier and 4.2.0.Final through 4.2.14.Final allows attackers to interrupt service. RedisDecoder.decodeLength buffers network bytes for bulk-string and array lengths until a newline arrives without enforcing a maximum length. Unauthenticated network access to an application that uses RedisDecoder for untrusted Redis traffic and multiple concurrent connections are required; direct-memory exhaustion prevents legitimate connections from being processed.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Netty 4.1.134.Final and earlier and 4.2.0.Final through 4.2.14.Final allows attackers to interrupt service. RedisDecoder.decodeLength buffers network bytes for bulk-string and array lengths until a newline arrives without enforcing a maximum length. Unauthenticated network access to an application that uses RedisDecoder for untrusted Redis traffic and multiple concurrent connections are required; direct-memory exhaustion prevents legitimate connections from being processed.

The record

CVE
CVE-2026-44890
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
The Netty Project
Product
Netty
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 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=< 4.1.135.Final
  2. Affected versionversion=>= 4.2.0.Final, < 4.2.15.Final

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Netty Project · Nettyversion=< 4.1.135.Final; version=>= 4.2.0.Final, < 4.2.15.Final

Published CVSS scores

7.5GitHubCVSS: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 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

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

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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