SB2026051907 - IBM DevOps Test Performance update for Netty

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Main Vulnerability Database SB2026051907

SB2026051907 - IBM DevOps Test Performance update for Netty

Published: May 19, 2026

Security Bulletin ID SB2026051907
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) HTTP response splitting (CVE-ID: CVE-2026-42578)

CWE-ID: CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to inject arbitrary HTTP headers into CONNECT proxy requests.

The vulnerability exists due to improper neutralization of CRLF sequences in HTTP headers in io.netty.handler.proxy.HttpProxyHandler newInitialMessage() when handling user-influenced outbound headers. A remote attacker can supply crafted header values containing CRLF sequences to inject arbitrary HTTP headers into CONNECT proxy requests.

Exploitation requires an application to use HttpProxyHandler with user-influenced outboundHeaders without performing its own CRLF sanitization.


Remediation

Install update from vendor's website.

References