Apache Camel-Mail: The mail producer applied attacker-supplied mail.smtp.* / mail.smtps.* message headers as JavaMail session properties

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

3.7 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2026-46584: 0.56% estimated exploitation activity in the next 30 days; percentile 46.80 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Improper Input Validation, Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Camel Mail Component. The camel-mail producer (MailProducer.getSender) scanned the outgoing Exchange for message headers in the mail.smtp. / mail.smtps. namespace and, when any were present, built a per-message JavaMail sender with those values applied as JavaMail session properties, overriding the endpoint configuration. This namespace is Camel-internal - only MailProducer interprets it - and was not blocked by any HeaderFilterStrategy, so the values could originate from any inbound protocol (for example platform-http query parameters or request headers, or JMS / Kafka messages from untrusted producers) that feeds a route ending in an smtp / smtps producer without an intervening removeHeaders. The maximal impact is version-dependent: on releases before 4.19.0, setting mail.smtp.host redirects the SMTP connection to a server under the attacker's control, and because the…

Published by the source

6 Jul 2026, 09:30 UTC

Last modified by the source

28 Aug 2026, 19:28 UTC

Source last checked

26 Oct 2026, 16:55 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-29vj-9mgp-mwp2

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# Patch Next advisory brief: CVE-2026-46584

Advisory: Apache Camel-Mail: The mail producer applied attacker-supplied mail.smtp.* / mail.smtps.* message headers as JavaMail session properties
IDs: CVE-2026-46584, GHSA-29vj-9mgp-mwp2
Record: https://patchnext.com/advisories/cve-2026-46584 (revision 1, source checked 26 Oct 2026, 16:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.apache.camel:camel-mail 4.21.0, 4.18.3, 4.14.8. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.apache.camel:camel-mail: affected >= 4.0.0, < 4.14.8; >= 4.15.0, < 4.18.3; >= 4.19.0, < 4.21.0; fixed in 4.21.0, 4.14.8, 4.18.3

## Suggested inspection (read-only)
- Maven org.apache.camel:camel-mail: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.apache.camel:camel-mail.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-29vj-9mgp-mwp2 (GitHub-reviewed advisory GHSA-29vj-9mgp-mwp2 lists affected ranges: Maven org.apache.camel:camel-mail >=4.0.0 =4.15.0 =4.19.0 <4.21.0)

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