PatchSiren cyber security CVE debrief

CVE-2026-50629 Apache Software Foundation CVE debrief

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.

Vendor: Apache Software Foundation
Product: Apache CXF
CVSS: MEDIUM 5.3
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-12
Original CVE updated: 2026-08-07
Advisory published: 2026-06-12
Advisory updated: 2026-08-07

Who should care

Users of Apache CXF versions prior to 4.2.2 or 4.1.7 should upgrade to a patched version to prevent log injection attacks.

Technical summary

The vulnerability has a CVSS score of 5.3 and is classified as CWE-93. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Defensive priority

MEDIUM

Recommended defensive actions

Upgrade to Apache CXF version 4.2.2 or 4.1.7 to fix the issue.

Evidence notes

The vulnerability was published on June 12, 2026, and modified on the same day.

Sources and references

Verified primary and authoritative sources

CVE-2026-50629 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-50629

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-50629 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50629

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Mitigation or vendor reference
Unverified legacy reference

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

[email protected] - Vendor Advisory

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.