CVE-2026-86463Apache CXF: FIQL Query Parser Denial of Service
Updated under an hour ago ()
Does this affect you?
It affects Apache Software Foundation Apache CXF. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.32%, higher than 24% of scored CVEs.
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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
- 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.32% (percentile 24)
- Assigned by
- apache
- NVD analysis
- Undergoing Analysis
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apache Software Foundation Apache CXF apache_software_foundation:apache_cxf (from the name) | from 4.2.0 before 4.2.4; from 4.0.0 before 4.1.9; before 3.6.13 | CNA record |
References
- https://lists.apache.org/thread.html/mv5qfmd27gkbvt3k6by9db5bolrsbgy1vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/10/09/8
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.