Description
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.
Published: 2026-09-18
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

See https://github.com/netty/netty/security/advisories/GHSA-wxrh-4rgq-pjcg for fixed versions and remediation guidance.

Tracking

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Advisories

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History

Mon, 21 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Io.netty
Io.netty netty-codec-http
Redhat build Of Apache Camel For Spring Boot
Redhat quay 3
Redhat rsingle Sign-on
Vendors & Products Io.netty
Io.netty netty-codec-http
Redhat build Of Apache Camel For Spring Boot
Redhat quay 3
Redhat rsingle Sign-on

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Description Memcache binary codec signed/unsigned type mismatch causes frame desynchronization and response smuggling 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.
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Title Netty: netty-codec-memcache: io.netty/netty-codec-memcache: netty: memcache binary codec signed/unsigned type mismatch causes frame desynchronization and response smuggling Io.netty/netty-codec-memcache: netty: memcache binary codec signed/unsigned type mismatch causes frame desynchronization and response smuggling

Fri, 18 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}


Fri, 18 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Fri, 18 Sep 2026 10:30:00 +0000

Type Values Removed Values Added
Description Memcache binary codec signed/unsigned type mismatch causes frame desynchronization and response smuggling
Title Netty: netty-codec-memcache: io.netty/netty-codec-memcache: netty: memcache binary codec signed/unsigned type mismatch causes frame desynchronization and response smuggling
First Time appeared Redhat
Redhat camel Spring Boot
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat red Hat Single Sign On
Weaknesses CWE-1035
CPEs cpe:/a:redhat:camel_spring_boot:4
cpe:/a:redhat:jboss_enterprise_application_platform:7
cpe:/a:redhat:jboss_fuse:7
cpe:/a:redhat:red_hat_single_sign_on:7
Vendors & Products Redhat
Redhat camel Spring Boot
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat red Hat Single Sign On
References

Subscriptions

Io.netty Netty-codec-http
Redhat Build Of Apache Camel For Spring Boot Camel Spring Boot Jboss Enterprise Application Platform Jboss Fuse Quay 3 Red Hat Single Sign On Rsingle Sign-on
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-18T20:18:54.565Z

Reserved: 2026-09-18T09:47:37.249Z

Link: CVE-2026-93561

cve-icon Vulnrichment

Updated: 2026-09-18T14:54:26.760Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T11:17:21.650

Modified: 2026-09-18T21:18:46.847

Link: CVE-2026-93561

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-10T00:44:07Z

Links: CVE-2026-93561 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T19:25:56Z

Weaknesses