CVE-2025-67735
Last modified
CVE-2025-67735 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.129.Final and 4.2.8.Final, the `io.netty.handler.codec.http.HttpRequestEncoder` has a CRLF injection with the request URI when constructing a request. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
Description
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.129.Final and 4.2.8.Final, the `io.netty.handler.codec.http.HttpRequestEncoder` has a CRLF injection with the request URI when constructing a request. This leads to request smuggling when `HttpRequestEncoder` is used without proper sanitization of the URI. Any application / framework using `HttpRequestEncoder` can be subject to be abused to perform request smuggling using CRLF injection. Versions 4.1.129.Final and 4.2.8.Final fix the issue.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Netty | Netty | < 4.1.129 |
| Netty | Netty | >= 4.2.0, < 4.2.8 |
References
- https://github.com/netty/netty/security/advisories/GHSA-84h7-rjj3-6jx4Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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