Vulnerability in Apache Cxf
CVE-2026-50629
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.
Vulnerability class: CRLF Injection
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (51.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Apache Cxf
- Apache Software Foundation Cxf — versions 4.0.0, 0, 4.2.0
Weakness classification (CWE)
References
- lists.apache.org/thread/xw95po30p8th58ms1no6b0f2375cql00 (vendor-advisory, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-50629?
- CVE-2026-50629 is a medium-severity vulnerability in Apache Cxf, classified under CRLF Injection. CVSS score: 5.3/10. Published 2026-06-12.
- How severe is CVE-2026-50629?
- Medium severity. CVSS v3 base score is 5.3 out of 10.