CVE-2026-93488Io.netty/netty-codec-http: netty: denial of service via unbounded concurrent spdy streams
Updated under an hour ago ()
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It affects Red Hat Build of Apache Camel 3.33.3.SP2 and 12 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Build of Apache Camel 3.33.3.SP2 redhat:apache_camel_quarkus | from 4.1.138.Final-redhat-00001 not affected | CNA record |
Red Hat Red Hat Build of Debezium 3.6 redhat:debezium | 3.6 | CNA record |
Red Hat Red Hat build of Quarkus 3.27.5.SP2 redhat:quarkus | 3.27 | CNA record |
Red Hat Red Hat AMQ Broker 7 redhat:amq_broker | 7 | CNA record |
Red Hat Red Hat AMQ Clients redhat:amq_clients | 2023 | CNA record |
Red Hat Red Hat build of Apache Camel 4 for Quarkus 3 redhat:camel_quarkus | 3 | CNA record |
Red Hat Red Hat build of Apache Camel for Spring Boot 4 redhat:camel_spring_boot | 4 | CNA record |
Red Hat Red Hat build of Apicurio Registry 3 redhat:apicurio_registry | 3 | CNA record |
Red Hat Red Hat Build of Keycloak redhat:build_keycloak | All versions | CNA record |
Red Hat Red Hat Data Grid 8 redhat:jboss_data_grid | 8 | CNA record |
Red Hat Red Hat Fuse 7 redhat:jboss_fuse | 7 | CNA record |
Red Hat Red Hat JBoss Enterprise Application Platform 7 redhat:jboss_enterprise_application_platform | 7 | CNA record |
Red Hat Red Hat Single Sign-On 7 redhat:red_hat_single_sign_on | 7 | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:69440vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:69470vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70257vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:83612vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-93488vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2536887issue-tracking, x-refsource-redhat
- https://github.com/netty/netty/releases/tag/netty-4.1.138.Final
- https://github.com/netty/netty/releases/tag/netty-4.2.18.Final
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.