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.
CVE-2026-86463
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-86463
Apache CXF
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Apache Software Foundation",
"product": "Apache CXF",
"versions": [
{
"status": "affected",
"version": "4.2.0",
"lessThan": "4.2.4",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.0.0",
"lessThan": "4.1.9",
"versionType": "semver"
},
{
"status": "affected",
"version": "0",
"lessThan": "3.6.13",
"versionType": "semver"
}
],
"packageURL": "pkg:maven/org.apache.cxf/cxf-rt-rs-extension-search",
"packageName": "org.apache.cxf:cxf-rt-rs-extension-search",
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-86463
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #29775 · Revision 1
- Added to Heist Feed
- Publisher date