Vulnerability in Netty
CVE-2026-41417
Netty allows request-line validation to be bypassed when a `DefaultHttpRequest` or `DefaultFullHttpRequest` is created first and its URI is later changed via `setUri()`. The constructors reject CRLF and whitespace characters that would bre…
Vulnerability class: CRLF Injection
EPSS: 0.000 (5.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Netty — versions >= 4.2.0.Alpha1, <= 4.2.12.Final, <= 4.1.132.Final
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-41417?
- CVE-2026-41417 is a medium-severity vulnerability in Netty, classified under CRLF Injection. CVSS score: 5.3/10. Published 2026-05-06.
- How severe is CVE-2026-41417?
- Medium severity. CVSS v3 base score is 5.3 out of 10.