What is CVE-2026-50020?

CVE-2026-50020 is a medium-severity vulnerability, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 5.3/10. Published 2026-06-12.

How severe is CVE-2026-50020?

Medium severity. CVSS v3 base score is 5.3 out of 10.

CVE-2026-50020

CVE-2026-50020

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, `HttpObjectDecoder` skips every byte for which `Character.is…

Vulnerability class: HTTP Request Smuggling

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Weakness classification (CWE)

CWE-444 — Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)

References

security-advisories@github.com
security-advisories@github.com
security-advisories@github.com

Frequently asked questions

What is CVE-2026-50020?: CVE-2026-50020 is a medium-severity vulnerability, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 5.3/10. Published 2026-06-12.
How severe is CVE-2026-50020?: Medium severity. CVSS v3 base score is 5.3 out of 10.