Vulnerability in Io.netty Netty-codec-redis
CVE-2026-42586
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, the Netty Redis codec encoder (RedisEncoder) writes user-controlled string content directly to the network output buffer without…
Vulnerability class: CRLF Injection
EPSS: 0.000 (0.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.
Affected products
- Io.netty Netty-codec-redis — versions >= 4.2.0.Alpha1, < 4.2.13.Final, < 4.1.133.Final
- Netty — versions >= 4.2.0.Alpha1, < 4.2.13.Final, < 4.1.133.Final
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-42586?
- CVE-2026-42586 is a medium-severity vulnerability in Io.netty Netty-codec-redis, classified under CRLF Injection. CVSS score: 6.8/10. Published 2026-05-13.
- How severe is CVE-2026-42586?
- Medium severity. CVSS v3 base score is 6.8 out of 10.