« Back to list

CVE-2026-100227

Status: Undergoing AnalysisUnscored—

Improper Verification of Cryptographic Signature vulnerability in Apache CXF's JAX-RS XML Security module. The JAX-RS XML Signature interceptors (XmlSigInHandler, XmlSigInInterceptor and the streaming XmlSecInInterceptor) did not ensure that the XML passed to the application was covered by the signature. An attacker with any document signed by a trusted key could wrap it in unsigned content, which the application would then treat as signed. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Apache — CXFAI

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-100227",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "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-security-xml",
          "packageName": "org.apache.cxf:cxf-rt-rs-security-xml",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-09T11:17:01.993",
  "references": [
    {
      "url": "https://lists.apache.org/thread.html/pst2oopnwt2rwhvkvmt5gdgwn36kq05m",
      "source": "security@apache.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/10/09/11",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Undergoing Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Verification of Cryptographic Signature vulnerability in Apache CXF's JAX-RS XML Security module. The JAX-RS XML Signature interceptors (XmlSigInHandler, XmlSigInInterceptor and the streaming XmlSecInInterceptor) did not ensure that the XML passed to the application was covered by the signature. An attacker with any document signed by a trusted key could wrap it in unsigned content, which the application would then treat as signed.\nUsers are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue."
    }
  ],
  "lastModified": "2026-10-09T16:33:39.007",
  "sourceIdentifier": "security@apache.org"
}