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CVE-2026-93491

Io.netty/netty-codec-http: netty: denial of service via unbounded httpservercodec http/1.1 pipeline queue

CVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-93491

Published

A flaw was found in Netty's HttpServerCodec. A remote, unauthenticated attacker can exploit this vulnerability by pipelining HTTP/1.1 requests on a single connection and withholding reads. This action causes the methodOverflowQueue to grow without limit, leading to unbounded heap memory consumption and a denial of service due to memory exhaustion.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-93491

Published

io.netty/netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Build of Apache Camel 3.33.3.SP2",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "io.netty/netty-codec-http",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "4.1.138.Final-redhat-00001",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:apache_camel_quarkus:3.33"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Build of Debezium 3.6",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "defaultStatus": "unaffected",
                    "packageName": "netty-codec-http",
                    "cpes": [
                        "cpe:/a:redhat:debezium:3.6"
                    ]
                }

rhbk/keycloak-operator-bundle

https://catalog.redhat.com/software/containers/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.4",
                    "collectionURL": "https://catalog.redhat.com/software/containers/",
                    "packageName": "rhbk/keycloak-operator-bundle",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "26.4.17-2",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:26.4::el9"
                    ]
                }

rhbk/keycloak-rhel9

https://catalog.redhat.com/software/containers/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.4",
                    "collectionURL": "https://catalog.redhat.com/software/containers/",
                    "packageName": "rhbk/keycloak-rhel9",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "26.4-29",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:26.4::el9"
                    ]
                }

rhbk/keycloak-rhel9-operator

https://catalog.redhat.com/software/containers/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.4",
                    "collectionURL": "https://catalog.redhat.com/software/containers/",
                    "packageName": "rhbk/keycloak-rhel9-operator",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "26.4-30",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:26.4::el9"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.4.17",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "defaultStatus": "unaffected",
                    "packageName": "netty-codec-http",
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:26.4::el9"
                    ]
                }

rhbk/keycloak-operator-bundle

https://catalog.redhat.com/software/containers/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.6",
                    "collectionURL": "https://catalog.redhat.com/software/containers/",
                    "packageName": "rhbk/keycloak-operator-bundle",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "26.6.8-2",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:26.6::el9"
                    ]
                }

rhbk/keycloak-rhel9

https://catalog.redhat.com/software/containers/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.6",
                    "collectionURL": "https://catalog.redhat.com/software/containers/",
                    "packageName": "rhbk/keycloak-rhel9",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "26.6-24",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:26.6::el9"
                    ]
                }

rhbk/keycloak-rhel9-operator

https://catalog.redhat.com/software/containers/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.6",
                    "collectionURL": "https://catalog.redhat.com/software/containers/",
                    "packageName": "rhbk/keycloak-rhel9-operator",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "26.6-24",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:26.6::el9"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.6.8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "defaultStatus": "unaffected",
                    "packageName": "netty-codec-http",
                    "cpes": [
                        "cpe:/a:redhat:build_keycloak:26.6::el9"
                    ]
                }

netty-codec-http

https://access.redhat.com/jbossnetwork/restricted/listSoftware.html

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Quarkus 3.27.5.SP2",
                    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
                    "defaultStatus": "unaffected",
                    "packageName": "netty-codec-http",
                    "cpes": [
                        "cpe:/a:redhat:quarkus:3.27::el8"
                    ]
                }

netty-codec-http

https://access.redhat.com/jbossnetwork/restricted/listSoftware.html

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Quarkus 3.33.3.SP2",
                    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
                    "defaultStatus": "unaffected",
                    "packageName": "netty-codec-http",
                    "cpes": [
                        "cpe:/a:redhat:quarkus:3.33::el8"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat JBoss Enterprise Application Platform 8.1",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "defaultStatus": "unaffected",
                    "packageName": "netty-codec-http",
                    "cpes": [
                        "cpe:/a:redhat:jboss_enterprise_application_platform:8.1"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat AMQ Broker 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:amq_broker:7"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat AMQ Clients",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:amq_clients:2023"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Apache Camel 4 for Quarkus 3",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:camel_quarkus:3"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Apache Camel for Spring Boot 4",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:camel_spring_boot:4"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat build of Apicurio Registry 3",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:apicurio_registry:3"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Data Grid 8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:jboss_data_grid:8"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Fuse 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "unknown",
                    "cpes": [
                        "cpe:/a:redhat:jboss_fuse:7"
                    ]
                }

netty-codec-http

https://access.redhat.com/jbossnetwork/restricted/listSoftware.html

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat JBoss Enterprise Application Platform 7",
                    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "unknown",
                    "cpes": [
                        "cpe:/a:redhat:jboss_enterprise_application_platform:7"
                    ]
                }

netty-codec-http

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Single Sign-On 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "netty-codec-http",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:red_hat_single_sign_on:7"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

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