CVE-2026-93561

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-93561
https://bugzilla.redhat.com/show_bug.cgi?id=2536949
https://bugzilla.redhat.com/show_bug.cgi?id=2536949

Configurations

No configuration.

History

18 Sep 2026, 21:18

Type	Values Removed	Values Added
Summary	~~(en) Memcache binary codec signed/unsigned type mismatch causes frame desynchronization and response smuggling~~	(en) 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.

18 Sep 2026, 15:17

Type	Values Removed	Values Added
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=2536949 -~~	() https://bugzilla.redhat.com/show_bug.cgi?id=2536949 -

18 Sep 2026, 14:19

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5

18 Sep 2026, 11:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-18 11:17

Updated : 2026-09-25 09:17

NVD link : CVE-2026-93561

Mitre link : CVE-2026-93561

CVE.ORG link : CVE-2026-93561

JSON object : View

Products Affected

No product.

CWE

CWE-1035

OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities

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