CVE-2026-33870

7.5 HIGH
Published: March 27, 2026 Modified: March 30, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8
Source: security-advisories@github.com
Exploit Mitigation Vendor Advisory
https://w4ke.info/2025/06/18/funky-chunks.html
Source: security-advisories@github.com
Technical Description
https://w4ke.info/2025/10/29/funky-chunks-2.html
Source: security-advisories@github.com
Technical Description
https://www.rfc-editor.org/rfc/rfc9110
Source: security-advisories@github.com
Technical Description

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.0%
12th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

netty