EUVD-2026-83169
GHSA-6w3j-2wqp-7r38
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Network-reachable and unauthenticated, but requires a specific H2-to-H1.1 translation topology (AC:H); smuggling affects a downstream backend (S:C) and is primarily an integrity attack (I:H) with limited disclosure (C:L).
Primary rating from Vendor (redhat).
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
A flaw was found in Netty's HTTP/2 stack. This vulnerability allows a remote attacker to inject prohibited characters, such as NUL, Line Feed, and Carriage Return, into HTTP/2 header field values due to insufficient validation. When these values cross an HTTP/2 to HTTP/1.1 translation boundary, they can be exploited for request smuggling, header injection, or response splitting. This could lead to unauthorized access, data manipulation, or other security bypasses.
AnalysisAI
HTTP request smuggling and header injection in Netty's HTTP/2 stack (as bundled in multiple Red Hat products) allow remote unauthenticated attackers to bypass security controls and manipulate requests when HTTP/2 traffic is translated to HTTP/1.1. Affected deployments include Red Hat AMQ Broker 7, Camel, Keycloak, Quarkus, Data Grid, Fuse, EAP, Apicurio Registry, and Debezium. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a deployment where Netty's HTTP/2 stack accepts inbound HTTP/2 requests and then translates them to HTTP/1.1 for a downstream/backend hop - the injection only becomes smuggling/splitting at that H2-to-H1.1 boundary (e.g., Netty acting as a front proxy or gateway ahead of HTTP/1.1 origins in Quarkus, Keycloak, AMQ Broker, Data Grid, Fuse, EAP, Camel, Apicurio, or Debezium builds). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a real but conditional integrity issue, not a top-tier emergency. … 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 is identified in the available intelligence; monitor the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-93579 and Bugzilla at https://bugzilla.redhat.com/show_bug.cgi?id=2536970 for patch availability. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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