CVE-2026-93561Network attack vectorHinoki check available

Response smuggling via signed length decoding

Published Sep 18, 2026 · Updated Sep 18, 2026

Numeric conversion errors in Netty netty-codec-memcache allow remote attackers controlling a Memcached server to smuggle responses. The binary request and response decoders read unsigned key and extras lengths as signed Java values, causing the extras check and body-length arithmetic to leave bytes unconsumed and cross frame boundaries. Exploitation requires a client using the binary codec to accept a crafted server response, after which data from one response stream can bleed into another.

CVSS severityUnavailable
Unscored
EPSS probability0.29%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Numeric conversion errors in Netty netty-codec-memcache allow remote attackers controlling a Memcached server to smuggle responses. The binary request and response decoders read unsigned key and extras lengths as signed Java values, causing the extras check and body-length arithmetic to leave bytes unconsumed and cross frame boundaries. Exploitation requires a client using the binary codec to accept a crafted server response, after which data from one response stream can bleed into another.

The record

CVE
CVE-2026-93561
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Commonhaus Foundation
Product
Red Hat JBoss Enterprise Application Platform 7
Classifications
CWE-195, CWE-681
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Commonhaus Foundation · Red Hat JBoss Enterprise Application Platform 7Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat build of Apache Camel for Spring Boot 4Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Single Sign-On 7Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Fuse 7Affected versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-195Signed to Unsigned Conversion Error
CWE-681Incorrect Conversion between Numeric Types

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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