{"id":"CVE-2025-67735","published":"2025-12-16T00:19:11Z","modified":"2025-12-16T14:26:48Z","title":"Netty has a CRLF Injection vulnerability in io.netty.handler.codec.http.HttpRequestEncoder","vendor":"netty","product":"netty","tier":"tail","description":{"text":"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.","provenance":"source","from":"CVE.org"},"cvss":{"score":6.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.0032,"percentile":0.25074,"provenance":"source"},"cwes":[{"id":"CWE-93","name":"Improper Neutralization of CRLF Sequences"}],"references":[{"url":"https://github.com/netty/netty/security/advisories/GHSA-84h7-rjj3-6jx4","tags":["x_refsource_CONFIRM"]}],"priority":{"score":9.6,"factors":[{"name":"EPSS percentile","points":5.01},{"name":"CVSS severity","points":4.55}]},"vendorSlug":"netty","affectedVersions":[{"vendor":"netty","product":"netty","versions":[">= 4.2.0.Alpha1, < 4.2.8.Final","< 4.1.129.Final"]}],"affected":[{"ecosystem":"Maven","package":"io.netty:netty-codec-http","vulnerableRanges":[">=4.2.0.Alpha1, <4.2.8.Final","<4.1.129.Final"],"patched":["4.2.8.Final","4.1.129.Final"],"from":["GHSA-84h7-rjj3-6jx4"],"provenance":"source"}],"euvd":{"id":"EUVD-2025-203450","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-netty-cve-2025-59419","children":[{"from":"CVE-2025-67735","to":"CVE-2026-42578","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-45q3-82m4-75jr","via":"reference","url":"https://github.com/advisories/GHSA-84h7-rjj3-6jx4"}]},{"from":"CVE-2025-67735","to":"CVE-2026-42586","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-rgrr-p7gp-5xj7","via":"reference","url":"https://github.com/netty/netty/security/advisories/GHSA-84h7-rjj3-6jx4"}]}],"packageHistory":[{"cve":"CVE-2022-41915","published":"2022-12-13","fixed":"4.1.86.Final","kev":false},{"cve":"CVE-2024-29025","published":"2024-03-25","fixed":"4.1.108.Final","kev":false},{"cve":"CVE-2025-58056","published":"2025-09-03","fixed":"4.2.5.Final","kev":false,"link":{"from":"CVE-2025-58056","to":"CVE-2025-67735","relation":"successor","confidence":"low","kind":"sequence","evidence":[{"kind":"version-step","provenance":"source","package":"Maven:io.netty:netty-codec-http","fromFixed":"4.2.5.Final","toFixed":"4.2.8.Final","daysApart":104}]}},{"cve":"CVE-2025-67735","published":"2025-12-16","fixed":"4.2.8.Final","kev":false},{"cve":"CVE-2026-33870","published":"2026-03-27","fixed":"4.2.10.Final","kev":false,"link":{"from":"CVE-2025-67735","to":"CVE-2026-33870","relation":"successor","confidence":"low","kind":"sequence","evidence":[{"kind":"version-step","provenance":"source","package":"Maven:io.netty:netty-codec-http","fromFixed":"4.1.129.Final","toFixed":"4.1.132.Final","daysApart":101}]}},{"cve":"CVE-2026-41417","published":"2026-05-06","fixed":"4.2.13.Final","kev":false},{"cve":"CVE-2026-42580","published":"2026-05-13","fixed":"4.2.13.Final","kev":false}],"package":"Maven:io.netty:netty-codec-http"}}