---
id: CVE-2026-93561
title: A flaw was found in io.netty/netty-codec-memcache
summary: >-
  A flaw was found in io.netty/netty-codec-memcache. The Memcache binary
  protocol codec incorrectly reads `keyLength` and `extrasLength` as signed Java
  types instead of unsigned, as specified by the protocol. A malicious Memcache
  server ca…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-1035
vendor: Red Hat
product: netty-codec-memcache
affected:
  - netty-codec-memcache (all versions)
  - netty-codec-memcache (all versions)
  - jboss-eap-7/eap74-els-openjdk11-openshift-rhel8 (all versions)
  - jboss-eap-7/eap74-els-openjdk17-openshift-rhel8 (all versions)
  - jboss-eap-7/eap74-els-openjdk8-openshift-rhel8 (all versions)
  - netty-codec-memcache (all versions)
  - netty-codec-memcache (all versions)
published: '2026-09-18'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T09:17:07.287'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93561'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-93561'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536949'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536949'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93561.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-93561'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93561'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00292
epssPercentile: 0.19337
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T14:48:56.320115Z'
ingestedAt: '2026-09-18T10:39:24.460Z'
---

## Overview

A flaw was found in io.netty/netty-codec-memcache. The Memcache binary protocol codec incorrectly reads `keyLength` and `extrasLength` as signed Java types instead of unsigned, as specified by the protocol. A malicious Memcache server can exploit this type mismatch by sending a specially crafted response. This can lead to frame desynchronization and response smuggling, where one client's data may be inadvertently exposed to another client's response stream in proxy or cache environments.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat build of Apache Camel for Spring Boot 4, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat Single Sign-On 7 · no fix planned: Red Hat build of Apache Camel for Spring Boot 4, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat Single Sign-On 7 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93561.json)