Medium severity · published Jun 12, 2026
CVE-2026-50629
Apache CXF: OAuth2: Log Injection via Unsanitized Client Identifier
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
Apache CXF · Apache Software Foundation
4.2.0 before 4.2.2; 4.0.0 before 4.1.7; before 3.6.12 · source: vendor
CX
Cxf · Apache
before 4.1.7; 4.2.0 before 4.2.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-50629
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-50629
Vendor Advisory
https://lists.apache.org/thread/xw95po30p8th58ms1no6b0f2375cql00
Mailing List
http://www.openwall.com/lists/oss-security/2026/06/11/6
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