Vulnerability · Published May 6, 2026 · Assigned by GitHub_M
CVE-2026-41417Netty vulnerable to HTTP request smuggling and RTSP request injection via DefaultHttpRequest.setUri()
Medium 5.3
In plain English
A medium-severity security flaw in netty from netty. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | netty | no fix listed | DEBIAN-CVE-2026-41417 |
| Debian:13 | netty | no fix listed | DEBIAN-CVE-2026-41417 |
| Debian:14 | netty | no fix listed | DEBIAN-CVE-2026-41417 |
| Maven | io.netty:netty-codec-http | 4.2.13.Final | GHSA-v8h7-rr48-vmmv |
| Maven | io.netty:netty-codec-http | 4.1.133.Final | GHSA-v8h7-rr48-vmmv |
| Ubuntu:25.10 | netty | no fix listed | UBUNTU-CVE-2026-41417 |
| Ubuntu:26.10 | netty | no fix listed | UBUNTU-CVE-2026-41417 |
Affected products (as reported)
Weakness: CWE-93, CWE-444 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/netty/netty/security/advisories/GHSA-v8h7-rr48-vmmv x_refsource_CONFIRM