Vulnerability · Published Sep 18, 2026 · Assigned by redhat
CVE-2026-93561Io.netty/netty-codec-memcache: netty: memcache binary codec signed/unsigned type mismatch causes frame desynchronization and response smuggling
Medium 6.5
In plain English
A medium-severity security flaw in Red Hat build of Apache Camel for Spring Boot 4 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Official description
A flaw was found in io.netty/netty-codec-memcache. The Memcache binary protocol codec incorrectly reads `keyLength` and `extrasLength` as signed Java types instead of unsigned, as specified by the protocol. A malicious Memcache server can exploit this type mismatch by sending a specially crafted response. This can lead to frame desynchronization and response smuggling, where one client's data may be inadvertently exposed to another client's response stream in proxy or cache environments.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | netty | no fix listed | DEBIAN-CVE-2026-93561 |
| Debian:13 | netty | no fix listed | DEBIAN-CVE-2026-93561 |
| Debian:14 | netty | no fix listed | DEBIAN-CVE-2026-93561 |
| Ubuntu:26.10 | netty | no fix listed | UBUNTU-CVE-2026-93561 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 | see references |
| Red Hat | Red Hat Fuse 7 | see references |
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 | see references |
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 | see references |
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 | see references |
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 | see references |
| Red Hat | Red Hat Single Sign-On 7 | see references |
Weakness: CWE-1035 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-93561 vdb-entry, x_refsource_REDHAT
- RHBZ#2536949 issue-tracking, x_refsource_REDHAT