Vulnerability Description
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 break the start-line, but `setUri()` does not apply the same validation. `HttpRequestEncoder` and `RtspEncoder` then write the URI into the request line verbatim. If attacker-controlled input reaches `setUri()`, this enables CRLF injection and insertion of additional HTTP or RTSP requests, leading to HTTP request smuggling or desynchronization on the HTTP side and request injection on the RTSP side. This issue is fixed in versions 4.2.13.Final and 4.1.133.Final.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Netty | Netty | < 4.1.133 |
Related Weaknesses (CWE)
References
- https://github.com/netty/netty/security/advisories/GHSA-v8h7-rr48-vmmvExploitMitigationVendor Advisory
- https://github.com/netty/netty/security/advisories/GHSA-v8h7-rr48-vmmvExploitMitigationVendor Advisory
FAQ
What is CVE-2026-41417?
CVE-2026-41417 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 a...
How severe is CVE-2026-41417?
CVE-2026-41417 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41417?
Check the references section above for vendor advisories and patch information. Affected products include: Netty Netty.