CVE-2026-50629

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, which fixes this issue.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0047

Probability of exploitation

0.37%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-93 CWE-93

Affected Products

Vendor	Product	Versions
apache	cxf	< 4.1.7
apache	cxf	4.2.0 — 4.2.2

References

Advisories & Patches

https://lists.apache.org/thread/xw95po30p8th58ms1no6b0f2375cql00

Other References

http://www.openwall.com/lists/oss-security/2026/06/11/6

Frequently Asked Questions

What is 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, which fixes this issue. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-50629? +

CVE-2026-50629 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0047, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-50629? +

CVE-2026-50629 affects products from apache, specifically: cxf. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-50629? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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