CVE-2026-93558

Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service

HIGH
7.5
CVSS Score
Published: September 18, 2026 at 02:09 PM UTC
Updated: October 15, 2026 at 05:17 PM UTC
13 products affected across 1 vendorBuild of DebeziumBuild of QuarkusBuild of Apache Camel

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
PoC

Description

Unbounded Per-Connection Queue Growth in WebSocketServerExtensionHandler Leads to Denial of Service

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
All versions7
All versions
All versions8
All versions
Vendor states this is fixed in 7 (unknown)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

VDB Entryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-93558
Issue Trackingx_refsource_REDHAT
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2536932
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:69470
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:69440
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:70257
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:83612

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-1035

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