CVE-2026-42581
- Source
- https://cve.org/CVERecord?id=CVE-2026-42581
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42581.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-42581
- Aliases
- Downstream
- Related
- Published
- 2026-05-13T17:54:44.492Z
- Modified
- 2026-05-20T04:03:09.619256725Z
- Severity
-
- 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
- Summary
- Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization
- Details
-
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder strips a conflicting Content-Length header when a request carries both Transfer-Encoding: chunked and Content-Length, but only for HTTP/1.1 messages. The guard is absent for HTTP/1.0. An attacker that sends an HTTP/1.0 request with both headers causes Netty to decode the body as chunked while leaving Content-Length intact in the forwarded HttpMessage. Any downstream proxy or handler that trusts Content-Length over Transfer-Encoding will disagree on message boundaries, enabling request smuggling. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
- Database specific
{ "cna_assigner": "GitHub_M", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42581.json", "cwe_ids": [ "CWE-444" ] }- References