FKIE_CVE-2026-86463

Vulnerability from fkie_nvd - Published: 2026-10-09 11:17 - Updated: 2026-10-09 16:33
Severity
Summary
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.
References
security@apache.orghttps://lists.apache.org/thread.html/mv5qfmd27gkbvt3k6by9db5bolrsbgy1
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/10/09/8
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "packageName": "org.apache.cxf:cxf-rt-rs-extension-search",
          "packageURL": "pkg:maven/org.apache.cxf/cxf-rt-rs-extension-search",
          "product": "Apache CXF",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "4.2.4",
              "status": "affected",
              "version": "4.2.0",
              "versionType": "semver"
            },
            {
              "lessThan": "4.1.9",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.6.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Apache CXF\u0027s 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.\n\nUsers are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue."
    }
  ],
  "id": "CVE-2026-86463",
  "lastModified": "2026-10-09T16:33:39.007",
  "metrics": {},
  "published": "2026-10-09T11:17:03.163",
  "references": [
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread.html/mv5qfmd27gkbvt3k6by9db5bolrsbgy1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/09/8"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Undergoing Analysis"
}



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