Disclosure summary
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. Netty prior to version 4.1.71.Final skips control chars when they are present at the beginning / end of the header name. It should instead fail fast as these are not allowed by the spec and could lead to HTTP request smuggling. Failing to do the validation might cause netty to "sanitize" header names before it forward these to another remote system when used as proxy. This remote system can't see the invalid usage anymore, and therefore does not do the validation itself. Users should upgrade to version 4.1.71.Final.
Source-reported weakness categories
CWE-444
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2021-43797
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| netty | netty | * {"versionEndExcluding":"4.1.71"} |
| quarkus | quarkus | * {"versionEndExcluding":"2.5.3"} |
| netapp | oncommand_workflow_automation | - |
| netapp | snapcenter | - |
| oracle | banking_deposits_and_lines_of_credit_servicing | 2.7 |
| oracle | banking_party_management | 2.7.0 |
| oracle | banking_platform | 2.6.2 |
| oracle | coherence | 12.2.1.4.0 |
| oracle | coherence | 14.1.1.0.0 |
| oracle | communications_cloud_native_core_binding_support_function | 1.11.0 |
| oracle | communications_cloud_native_core_network_slice_selection_function | 1.8.0 |
| oracle | communications_cloud_native_core_policy | 1.15.0 |
| oracle | communications_cloud_native_core_security_edge_protection_proxy | 1.7.0 |
| oracle | communications_cloud_native_core_unified_data_repository | 1.15.0 |
| oracle | communications_design_studio | 7.4.2 |
| oracle | communications_instant_messaging_server | 8.1 |
| oracle | helidon | 1.4.10 |
| oracle | helidon | 2.4.0 |
| oracle | peoplesoft_enterprise_peopletools | 8.58 |
| oracle | peoplesoft_enterprise_peopletools | 8.59 |
| debian | debian_linux | 10.0 |
| debian | debian_linux | 11.0 |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch, Third Party Advisory
- github.com — Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- security.netapp.com — Third Party Advisory
- www.debian.org — Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
- github.com — Patch, Third Party Advisory
- github.com — Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- security.netapp.com — Third Party Advisory
- www.debian.org — Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
PUBLISHED 2021-12-09T14:15:07-05:00
MODIFIED 2026-10-08T18:17:12-04:00
INGESTED 2026-10-10T20:50:21-04:00