CVE-2026-93492: CWE-1035 in Red Hat Red Hat AMQ Broker 7
A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS).
AI Analysis
Technical Summary
This vulnerability arises from Netty's HTTP/2 HpackEncoder improperly handling SETTINGS frames with very large MAX_HEADER_TABLE_SIZE values. The encoder stores an excessive number of unique headers, which increases CPU and memory usage, resulting in a denial of service. The issue affects Red Hat AMQ Broker 7, but specific affected versions are not detailed. The CVSS v3.1 score is 5.3, indicating a medium severity impact with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
A remote attacker can cause a denial of service by sending specially crafted HTTP/2 SETTINGS frames that cause excessive resource consumption in the HpackEncoder. This does not impact confidentiality or integrity but can disrupt service availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-93492 for current remediation guidance. No specific patches or workarounds are provided in the available data.
CVE-2026-93492: CWE-1035 in Red Hat Red Hat AMQ Broker 7
Description
A flaw was found in Netty's HTTP/2 HpackEncoder. A remote attacker can exploit this by sending HTTP/2 SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE. This causes the HpackEncoder to store an excessive number of unique headers, leading to increased CPU usage and memory consumption, ultimately resulting in a Denial of Service (DoS).
CVSS v3.1
Score 5.3medium
Affected software
Red Hat
Red Hat AMQ Broker 7
Red Hat
Red Hat build of Apache Camel 4 for Quarkus 3
Red Hat
Red Hat build of Apache Camel for Spring Boot 4
Red Hat
Red Hat build of Apicurio Registry 3
Red Hat
Red Hat build of Debezium 3
Red Hat
Red Hat Build of Keycloak
Red Hat
Red Hat build of Quarkus
Red Hat
Red Hat Data Grid 8
Red Hat
Red Hat Fuse 7
Red Hat
Red Hat JBoss Enterprise Application Platform 7
Red Hat
Red Hat JBoss Enterprise Application Platform 8
Red Hat
Red Hat Single Sign-On 7
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from Netty's HTTP/2 HpackEncoder improperly handling SETTINGS frames with very large MAX_HEADER_TABLE_SIZE values. The encoder stores an excessive number of unique headers, which increases CPU and memory usage, resulting in a denial of service. The issue affects Red Hat AMQ Broker 7, but specific affected versions are not detailed. The CVSS v3.1 score is 5.3, indicating a medium severity impact with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
A remote attacker can cause a denial of service by sending specially crafted HTTP/2 SETTINGS frames that cause excessive resource consumption in the HpackEncoder. This does not impact confidentiality or integrity but can disrupt service availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-93492 for current remediation guidance. No specific patches or workarounds are provided in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-09-18T07:15:03.252Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-93492","vendor":"Red Hat"}]
Threat ID: 6aad365d55bf5e2cf507faf0
Added to database: 09/18/2026, 13:02:21 UTC
Last enriched: 09/18/2026, 13:16:48 UTC
Last updated: 09/19/2026, 01:32:56 UTC
Views: 15
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