---
id: CVE-2026-50629
title: >-
  The 'clientId' parameter from incoming HTTP requests is directly concatenated
  into OAuth2 server log warning messages without sanitizing control characters
summary: >-
  The 'clientId' parameter from incoming HTTP requests is directly concatenated
  into OAuth2 server log warning messages without sanitizing control characters.
  This allows an attacker to inject arbitrary content, including fake log
  entries,…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-93
vendor: apache
product: cxf
affected:
  - cxf < 4.1.7
  - 'cxf >= 4.2.0, < 4.2.2'
patched:
  - cxf 4.2.2
published: '2026-06-12'
updated: '2026-08-07'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50629'
references:
  - url: 'https://lists.apache.org/thread/xw95po30p8th58ms1no6b0f2375cql00'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/06/11/6'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00703
epssPercentile: 0.512
ingestedAt: '2026-08-07T14:14:17.416Z'
---

## Overview

The 'clientId' parameter from incoming HTTP requests is directly concatenated into OAuth2 server log warning messages without sanitizing control characters. This allows an attacker to inject arbitrary content, including fake log entries, into the server's log files. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.

## Affected

- `cxf < 4.1.7`
- `cxf >= 4.2.0, < 4.2.2`

## Remediation

Upgrade past the affected range:

- `cxf 4.2.2`