Skip to content
Sign in
7.5 High

CVE-2026-93488 Io.netty/netty-codec-http: netty: denial of service via unbounded concurrent spdy streams

Description

A flaw was found in Netty. SpdySessionHandler accepts an unlimited number of concurrent remote-initiated streams because localConcurrentStreams defaults to Integer.MAX_VALUE and the handler provides no API to change it. A remote peer can open a SPDY connection and send a large number of SYN_STREAM frames with FLAG_FIN=0, causing unbounded heap and direct memory allocation that can lead to JVM OutOfMemoryError and a denial of service.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
Low
Privileges required
None
Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Affected products and versions

Product Affected versions Fixed in
Red Hat AMQ Broker 7 Versions not published
Red Hat AMQ Clients Versions not published
Red Hat build of Apache Camel 4 for Quarkus 3 Versions not published
Red Hat build of Apache Camel for Spring Boot 4 Versions not published
Red Hat build of Apicurio Registry 3 Versions not published
Red Hat build of Debezium 3 Versions not published
Red Hat Build of Keycloak Versions not published
Red Hat build of Quarkus Versions not published
Red Hat Data Grid 8 Versions not published
Show the 13 other branches
Product Affected versions Fixed in
Red Hat Fuse 7 Versions not published
Red Hat JBoss Enterprise Application Platform 7 Versions not published
Red Hat JBoss Enterprise Application Platform 8 Versions not published
Red Hat Single Sign-On 7 Versions not published
Red Hat Build of Apache Camel 3.33.3.SP2 4.1 earliest → < 4.1.138.Final-redhat-00001 4.1.138.Final-redhat-00001
Red Hat build of Quarkus 3.27.5.SP2 Versions not published
Red Hat build of Quarkus 3.33.3.SP2 Versions not published
Red Hat Build of Debezium 3.6 Versions not published
Red Hat build of Keycloak 26.4 26.4 earliest → < 26.4-30 26.4-30
Red Hat build of Keycloak 26.6.8 Versions not published
Red Hat JBoss Enterprise Application Platform 8.1 Versions not published
Red Hat build of Keycloak 26.4.17 Versions not published
Red Hat build of Keycloak 26.6 26.6 earliest → < 26.6-24 26.6-24

Other CVEs of Red Hat AMQ Broker 7

The 88 CVEs of Red Hat AMQ Broker 7 →
CVE-2026-96453 Org.keycloak/keycloak-admin-cli: keycloak-admin-cli: kcadm custom truststore accepts arbitrary self-signed certificates 8.0 High CVE-2026-93998 Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configured identity provider issuer 7.4 High CVE-2026-101292 Apache ActiveMQ Artemis before 2.34.0 contains an unsafe reflection vulnerability in… 8.2 High CVE-2026-93562 Io.netty/netty-codec-http: netty: incomplete validation of malformed transfer-encoding allows http request smuggling 6.5 Medium
Track this CVE