CVE-2026-40453: Apache Camel has an incomplete fix for CVE-2025-27636
The fix for CVE-2025-27636 added setLowerCase(true) to HttpHeaderFilterStrategy so that case-variant header names such as 'CAmelExecCommandExecutable' are filtered out alongside 'CamelExecCommandExecutable'. The same setLowerCase(true) call was not applied to five non-HTTP HeaderFilterStrategy implementations: JmsHeaderFilterStrategy and ClassicJmsHeaderFilterStrategy in camel-jms, SjmsHeaderFilterStrategy in…
Published Apr 27, 2026 · Updated Oct 5, 2026
Affected packages
org.apache.camel:camel-coap
- Ecosystem
- Maven
- Affected
- >= 3.0.0, < 4.14.6
- Fixed in
- 4.14.6
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-coap
org.apache.camel:camel-coap
- Ecosystem
- Maven
- Affected
- >= 4.15.0, < 4.18.2
- Fixed in
- 4.18.2
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-coap
org.apache.camel:camel-coap
- Ecosystem
- Maven
- Affected
- >= 4.19.0, < 4.20.0
- Fixed in
- 4.20.0
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-coap
org.apache.camel:camel-google-pubsub
- Ecosystem
- Maven
- Affected
- >= 3.0.0, < 4.14.6
- Fixed in
- 4.14.6
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-google-pubsub
org.apache.camel:camel-google-pubsub
- Ecosystem
- Maven
- Affected
- >= 4.15.0, < 4.18.2
- Fixed in
- 4.18.2
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-google-pubsub
org.apache.camel:camel-google-pubsub
- Ecosystem
- Maven
- Affected
- >= 4.19.0, < 4.20.0
- Fixed in
- 4.20.0
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-google-pubsub
org.apache.camel:camel-jms
- Ecosystem
- Maven
- Affected
- >= 3.0.0, < 4.14.6
- Fixed in
- 4.14.6
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-jms
org.apache.camel:camel-jms
- Ecosystem
- Maven
- Affected
- >= 4.15.0, < 4.18.2
- Fixed in
- 4.18.2
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-jms
org.apache.camel:camel-jms
- Ecosystem
- Maven
- Affected
- >= 4.19.0, < 4.20.0
- Fixed in
- 4.20.0
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-jms
org.apache.camel:camel-sjms
- Ecosystem
- Maven
- Affected
- >= 3.0.0, < 4.14.6
- Fixed in
- 4.14.6
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-sjms
org.apache.camel:camel-sjms
- Ecosystem
- Maven
- Affected
- >= 4.15.0, < 4.18.2
- Fixed in
- 4.18.2
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-sjms
org.apache.camel:camel-sjms
- Ecosystem
- Maven
- Affected
- >= 4.19.0, < 4.20.0
- Fixed in
- 4.20.0
- Check
mvn dependency:tree -Dincludes=org.apache.camel:camel-sjms
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
The fix for CVE-2025-27636 added setLowerCase(true) to HttpHeaderFilterStrategy so that case-variant header names such as 'CAmelExecCommandExecutable' are filtered out alongside 'CamelExecCommandExecutable'. The same setLowerCase(true) call was not applied to five non-HTTP HeaderFilterStrategy implementations: JmsHeaderFilterStrategy and ClassicJmsHeaderFilterStrategy in camel-jms, SjmsHeaderFilterStrategy in camel-sjms, CoAPHeaderFilterStrategy in camel-coap, and GooglePubsubHeaderFilterStrategy in camel-google-pubsub. Because those strategies use case-sensitive String.startsWith('Camel'/'camel') filtering while the Camel Exchange stores headers in a case-insensitive map, an attacker with JMS (or equivalent) producer access to the broker consumed by a Camel route can inject case-variant Camel internal headers, which are then resolved by downstream components such as camel-exec and camel-file using their canonical casing. This enables remote code execution and arbitrary file write on routes that forward JMS messages to header-driven components.
This issue affects Apache Camel: from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.2, from 4.19.0 before 4.20.0.
Users are recommended to upgrade to version 4.20.0, which fixes the issue. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.6. If users are on the 4.18.x releases stream, then they are suggested to upgrade to 4.18.2.
Credited to kmagdziarz.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-40453
- https://camel.apache.org/security/CVE-2026-40453.html
- https://github.com/apache/camel/pull/22569
- https://github.com/apache/camel/pull/22575
- https://github.com/apache/camel/pull/22576
- https://github.com/apache/camel/commit/1e331daa4eea0a3f01d951e74cda8faee79495a2
- https://github.com/apache/camel/commit/301bb7401cd480895b94a28a8ad6cf04952d8125
- https://github.com/apache/camel/commit/3d2efeed2f6ea757f0254a1d1cdeb9a4f28ca147
- https://issues.apache.org/jira/browse/CAMEL-23313
- https://access.redhat.com/errata/RHSA-2026:17668
- https://access.redhat.com/errata/RHSA-2026:19835
- https://access.redhat.com/security/cve/CVE-2026-40453
- https://bugzilla.redhat.com/show_bug.cgi?id=2463173
- https://github.com/advisories/GHSA-jg2m-9x48-3gvj
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology