CVE-2026-86463
highApache CXF's FIQL query parser has a vulnerability in how it searches for operators in query expressions.
Vendor / product: Apache — cxf
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://lists.apache.org/thread.html/mv5qfmd27gkbvt3k6by9db5bolrsbgy1 security@apache.org
- http://www.openwall.com/lists/oss-security/2026/10/09/8 af854a3a-2127-422b-91ae-364da2661108