Riskcovery

CVE-2026-86463

Apache CXF: FIQL Query Parser Denial of Service

State
Published
Severity
7.5 High
Published
Oct 9, 2026
Updated
Oct 15, 2026
Reserved
Sep 7, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCISA-ADP

Weaknesses

  • CWE-400 Uncontrolled Resource Consumption

Affected Products

ProductVersions
Apache CXFApache Software Foundation
  • 4.2.0 to before 4.2.4Affected
  • 4.0.0 to before 4.1.9Affected
  • before 3.6.13Affected

References

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