CVE-2026-86463
Apache CXF: FIQL Query Parser Denial of Service
Apache CXF's FIQL query parser has a vulnerability in how it searches for operators in query expressions. The search pattern can get stuck trying many combinations when it encounters a long string without an operator, causing the parser to consume excessive CPU time. An attacker can send a crafted query to make the server use up CPU resources, potentially slowing down or stopping other requests. The fix was to limit FIQL expressions to 4 KiB by default, preventing attackers from sending extremely long inputs while still allowing normal queries. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
| Vendor | apache software foundation |
| Product | apache cxf |
| Published | Oct 9, 2026 |
| Last Updated | Oct 9, 2026 |
Get instant alerts for apache software foundation apache cxf
Be the first to know when new unknown vulnerabilities affecting apache software foundation apache cxf are published — delivered to Slack, Telegram or Discord.