CVE-2026-93566 PUBLISHED

Io.netty/netty-codec-http: netty: http request smuggling due to control characters in the chunk-size line

Assigner: redhat
Reserved: 18.09.2026 Published: 18.09.2026 Updated: 18.09.2026

A flaw was found in Netty. A remote attacker could exploit this by sending a specially crafted HTTP request that includes control characters within the chunk-size line. This bypasses the intended strict validation, allowing the attacker to inject arbitrary HTTP requests. This vulnerability can lead to HTTP request smuggling, potentially resulting in information disclosure or other unauthorized actions.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS Score: 6.5

Product Status

Vendor Red Hat
Product Red Hat AMQ Broker 7
Versions Default: affected
Vendor Red Hat
Product Red Hat AMQ Clients
Versions Default: affected
Vendor Red Hat
Product Red Hat build of Apache Camel 4 for Quarkus 3
Versions Default: affected
Vendor Red Hat
Product Red Hat build of Apache Camel for Spring Boot 4
Versions Default: affected
Vendor Red Hat
Product Red Hat build of Apicurio Registry 3
Versions Default: unknown
Vendor Red Hat
Product Red Hat build of Debezium 3
Versions Default: affected
Vendor Red Hat
Product Red Hat Build of Keycloak
Versions Default: unknown
Vendor Red Hat
Product Red Hat build of Quarkus
Versions Default: unknown
Vendor Red Hat
Product Red Hat Data Grid 8
Versions Default: unknown
Vendor Red Hat
Product Red Hat Fuse 7
Versions Default: unknown
Vendor Red Hat
Product Red Hat JBoss Enterprise Application Platform 7
Versions Default: unknown
Vendor Red Hat
Product Red Hat JBoss Enterprise Application Platform 8
Versions Default: affected
Vendor Red Hat
Product Red Hat Single Sign-On 7
Versions Default: unknown

Workarounds

See https://github.com/netty/netty/security/advisories/GHSA-rq4j-fc47-9698 for fixed versions and remediation guidance.

References

Problem Types

  • CWE-1035 CWE