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CVE-2026-33870 Detail

Description

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8 GitHub, Inc. Exploit  Mitigation  Vendor Advisory 
https://w4ke.info/2025/06/18/funky-chunks.html GitHub, Inc. Technical Description 
https://w4ke.info/2025/10/29/funky-chunks-2.html GitHub, Inc. Technical Description 
https://www.rfc-editor.org/rfc/rfc9110 GitHub, Inc. Technical Description 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-33870
NVD Published Date:
03/27/2026
NVD Last Modified:
03/30/2026
Source:
GitHub, Inc.