CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NCVE-2026-33870
High (7.5) in netty netty. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in io.netty:netty-codec-http 4.1.132.Final, 4.2.10.Final.
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.
Severity
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
- CWE
- CWE-444
- Published
- Modified
- Record from
- the NVD, synced
Affected
- netty:netty
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-pwqr-wmgm-9rr8 | Maven | io.netty:netty-codec-http | <4.1.132.Final | 4.1.132.Final |
| GHSA-pwqr-wmgm-9rr8 | Maven | io.netty:netty-codec-http | >=4.2.0.Alpha1 <4.2.10.Final | 4.2.10.Final |