High [CVE-2026-59899] Memory exhaustion in netty-codec-http (decompression bomb)
This high-severity Red Hat Linux advisory covers CVE-2026-59899 affecting Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16, Red Hat Build of Apache Camel 4.18 for Quarkus 3.33, Red Hat build of Quarkus 3.27.4.SP3.
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Summary
Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, `HttpContentEncoder` (the superclass of the production handler `HttpContentCompressor`) maintains a per-channel `ArrayDeque` named `acceptEncodingQueue` that accumulates attacker-controlled data without any size limit.
The queue is filled on the I/O thread for every inbound HTTP request and drained only when the application later writes a non-1xx response. This creates a resource exhaustion vulnerability when an attacker exploits HTTP/1.1 pipelining to flood the connection with requests faster than the application produces responses.
A flaw was found in the Netty netty-codec-http component. A remote attacker can send HTTP requests containing highly compressed data.
This can lead to memory exhaustion and a denial of service (DoS), making the service unavailable to legitimate users. This is an Important vulnerability in Netty's HTTP decoder, which could lead to a denial of service.
Red Hat products utilizing `netty-codec-http` are susceptible to memory exhaustion when processing specially crafted, highly compressed HTTP payloads. This allows a remote attacker to trigger excessive memory allocation, impacting system availability.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-409.
- < 4.1.136.Final
- < 4.2.16.Final
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
- 4.1.136
- 4.2.16
- netty-codec-http
- devspaces/openvsx-rhel9:1787759145
- devspaces/pluginregistry-rhel9:1787759723
- RHSA-2026:54622
- RHSA-2026:48118
- RHSA-2026:47189
- RHSA-2026:47172
- RHSA-2026:54435
- RHSA-2026:62260
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
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