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Apache Camel: Camel-Mail Header Injection via Unfiltered mail.smtp Headers in the MimeMultipart Data Format (Incomplete Fix of CVE-2026-46584)

Type: advisorySource: Official CVE List1 source record

Improper Input Validation vulnerability in Apache Camel Mail component. This issue affects Apache Camel: from 4.0.0 before 4.18.5, from 4.19.0 before 4.22.1. CVE-2026-46584 addressed mail headers reaching the Exchange without passing through a header filter, but the MimeMultipart data format retained an unfiltered path: unmarshalling a multipart message mapped mail.smtp headers onto the Exchange with no filter applied. Those names sit outside the Camel namespace that consumer filters block, so a message crafted by an external sender could still set them, and the mail.smtp namespace influences how a downstream mail producer connects and sends. This is an incomplete fix of CVE-2026-46584 rather than a new class of defect: a deployment that applied that advisory and considered camel-mail settled remained exposed on this path. Upgrade to Apache Camel 4.23.0, which fixes the issue. Users on the 4.18.x LTS releases stream should upgrade to 4.18.5. Users on the 4.22.x LTS releases stream should upgrade to 4.22.1. The MimeMultipart data format now applies the header filter on unmarshal, closing the path CVE-2026-46584 left open. For deployments that cannot upgrade immediately, strip the namespace after the data format with removeHeaders("mail.smtp*") before any mail producer.

Announced Source revision 1
Original source ↗

CVE-2026-85314

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-2026-85314

Apache Camel

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 Camel",
    "versions": [
      {
        "status": "affected",
        "version": "4.0.0",
        "lessThan": "4.18.5",
        "versionType": "maven"
      },
      {
        "status": "affected",
        "version": "4.19.0",
        "lessThan": "4.22.1",
        "versionType": "maven"
      },
      {
        "status": "unaffected",
        "version": "4.18.5",
        "versionType": "maven"
      },
      {
        "status": "unaffected",
        "version": "4.22.1",
        "versionType": "maven"
      },
      {
        "status": "unaffected",
        "version": "4.23.0",
        "versionType": "maven"
      }
    ],
    "packageURL": "pkg:maven/org.apache.camel/camel-mail",
    "packageName": "org.apache.camel:camel-mail",
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-85314

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#38892 · Revision 1
Added to Heist Feed
Publisher date
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