CVE-2026-55833
CVE-2026-55833: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-55833] Denial of Service via SPDY header decompression amplification
CVE-2026-55833Source published Source updated
Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty SPDY header decoding continues inflating zlib-compressed header blocks after the raw header parser has exceeded `maxHeaderSize` and marked the frame truncated in `SpdyFrameCodec`, allowing a remote peer to send a small compressed `HEADERS` block that expands into much larger raw header data and causes compression-amplified CPU and allocation churn. By sending a specially crafted, small compressed header block, the attacker can cause it to expand significantly during decompression, leading to excessive CPU usage and memory allocation. This can result in a denial of service (DoS) due to resource exhaustion. This is an Important denial of service…
- Affected products in this advisory
- Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16
- Red Hat build of Quarkus 3.27.4.SP3
- Red Hat build of Quarkus 3.33.2.SP3
- Streams for Apache Kafka 3.2.1
16 more entries in the full advisory.
- Source-reported affected versions
- < 4.1.136.Final
- < 4.2.16.Final
- Source-reported fixed versions
- 4.1.136
- 4.2.16
- netty-codec-http
- devspaces/openvsx-rhel9:1787759145
6 more entries in the full advisory.
- Mitigation guidance
- 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.
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