EUVD-2026-83386
GHSA-c599-gp9v-cp79
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Unauthenticated remote request over the network with low complexity; smuggling yields partial confidentiality/integrity via control bypass, no availability impact, scope unchanged per vendor.
Primary rating from Vendor (redhat).
CVSS VectorNVD
Lifecycle Timeline
4DescriptionNVD
A flaw was found in Netty's HTTP/1 decoder. Incomplete validation of malformed Transfer-Encoding headers allows a remote attacker to perform HTTP request smuggling. By sending specially crafted HTTP requests, an attacker can inject arbitrary HTTP requests, potentially bypassing security controls or accessing unauthorized resources.
AnalysisAI
HTTP request smuggling in Netty's HTTP/1 decoder lets remote, unauthenticated attackers bypass front-end security controls and reach resources they should not access by sending requests with malformed Transfer-Encoding headers. Netty is a widely embedded Java networking library, so the practical reach spans Red Hat products built on it - AMQ Broker 7, AMQ Clients, Red Hat Build of Keycloak, Red Hat Build of Quarkus, Red Hat Build of Apache Camel (Spring Boot 4 and Quarkus 3), Red Hat Build of Debezium 3, Red Hat Build of Apicurio Registry 3, Red Hat Data Grid 8 and Red Hat Fuse 7 - as well as JBoss EAP 7/8 and Red Hat Single Sign-On 7 per the associated advisory tags. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation targets an application using Netty's HTTP/1 decoder to parse inbound requests containing malformed Transfer-Encoding headers. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 3.1 rates this 6.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N): network-reachable, low-complexity, unauthenticated, no user interaction, with partial confidentiality and integrity impact and no availability impact - a profile consistent with HTTP request smuggling rather than a full-compromise flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch or fixed Netty version is identified in the data provided - the only references are the Red Hat CVE page (https://access.redhat.com/security/cve/CVE-2026-93562) and the Red Hat Bugzilla tracking record (https://bugzilla.redhat.com/show_bug.cgi?id=2536951), so the state is best described as "No vendor-released patch identified at time of analysis"; track both URLs for the Red Hat errata and the upstream Netty release that corrects Transfer-Encoding validation, then upgrade the Netty dependency across every affected product listed above. … Detailed patch versions, workarounds, and compensating controls in full report. |
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