CVE-2026-93574
Io.netty/netty-codec-http: netty: http request smuggling via post-digit whitespace in chunk-size parsing
- State
- Published
- Severity
- 6.5 Medium
- Published
- Sep 18, 2026
- Updated
- Oct 15, 2026
- Reserved
- Sep 18, 2026
Description
A flaw was found in Netty's `netty-codec-http` component. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP/1.1 chunk-size token that includes post-digit whitespace. This incorrect parsing of the chunk size can lead to HTTP request smuggling. This allows an attacker to bypass security controls or access unauthorized resources in proxy/backend deployments.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L | redhat |
Weaknesses
- CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected Products
| Product | Versions |
|---|---|
Red Hat Build of Debezium 3.6Red Hat | |
Red Hat build of Quarkus 3.27.5.SP2Red Hat | |
Red Hat build of Quarkus 3.33.3.SP2Red Hat | |
Red Hat AMQ Broker 7Red Hat | |
Red Hat AMQ ClientsRed Hat | |
Red Hat build of Apache Camel 4 for Quarkus 3Red Hat | |
Red Hat build of Apache Camel for Spring Boot 4Red Hat | |
Red Hat build of Apicurio Registry 3Red Hat | |
Red Hat Build of KeycloakRed Hat | |
Red Hat Data Grid 8Red Hat | |
Red Hat Fuse 7Red Hat | |
Red Hat JBoss Enterprise Application Platform 7Red Hat | |
Red Hat JBoss Enterprise Application Platform 8Red Hat | |
Red Hat Single Sign-On 7Red Hat |
References
- RHSA-2026:69440vendor-advisory
- RHSA-2026:69470vendor-advisory
- RHSA-2026:83612vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-93574vdb-entry
- RHBZ#2536966issue-tracking
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