{"id":"CVE-2025-67735","aliases":["GHSA-84h7-rjj3-6jx4"],"url":"https://o3.security/vulnerability/CVE-2025-67735","summary":"Netty has a CRLF Injection vulnerability in io.netty.handler.codec.http.HttpRequestEncoder","details":"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.","published":"2025-12-16T00:19:11.287Z","modified":"2026-08-12T03:51:43.759255148Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.netty:netty-codec-http","fixedVersion":"4.2.8.Final"},{"ecosystem":"Maven","name":"io.netty:netty-codec-http","fixedVersion":"4.1.129.Final"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/67xxx/CVE-2025-67735.json"},{"type":"ADVISORY","url":"https://github.com/netty/netty/security/advisories/GHSA-84h7-rjj3-6jx4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-67735"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:43.759255148Z"}}