Apache Camel has an incomplete fix for CVE-2025-27636

Exploitation

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

CVSS

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

EPSS

• CVE-2026-40453: 2.10% estimated exploitation activity in the next 30 days; percentile 81.76 (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.

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…

Published by the source

27 Apr 2026, 09:34 UTC

Last modified by the source

5 Oct 2026, 18:38 UTC

Source last checked

26 Oct 2026, 16:56 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-jg2m-9x48-3gvj

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# Patch Next advisory brief: CVE-2026-40453

Advisory: Apache Camel has an incomplete fix for CVE-2025-27636
IDs: CVE-2026-40453, GHSA-jg2m-9x48-3gvj
Record: https://patchnext.com/advisories/cve-2026-40453 (revision 1, source checked 26 Oct 2026, 16:56 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.9)
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-jms 4.20.0, 4.18.2, 4.14.6; org.apache.camel:camel-sjms 4.20.0, 4.18.2, 4.14.6; org.apache.camel:camel-google-pubsub 4.20.0, 4.18.2, 4.14.6; org.apache.camel:camel-coap 4.20.0, 4.18.2, 4.14.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.apache.camel:camel-jms: affected >= 3.0.0, < 4.14.6; >= 4.15.0, < 4.18.2; >= 4.19.0, < 4.20.0; fixed in 4.18.2, 4.14.6, 4.20.0
- Maven org.apache.camel:camel-sjms: affected >= 3.0.0, < 4.14.6; >= 4.15.0, < 4.18.2; >= 4.19.0, < 4.20.0; fixed in 4.18.2, 4.14.6, 4.20.0
- Maven org.apache.camel:camel-google-pubsub: affected >= 3.0.0, < 4.14.6; >= 4.15.0, < 4.18.2; >= 4.19.0, < 4.20.0; fixed in 4.18.2, 4.14.6, 4.20.0
- Maven org.apache.camel:camel-coap: affected >= 3.0.0, < 4.14.6; >= 4.15.0, < 4.18.2; >= 4.19.0, < 4.20.0; fixed in 4.18.2, 4.14.6, 4.20.0

## Suggested inspection (read-only)
- Maven org.apache.camel:camel-jms: check the installed version with your package manager.
- Maven org.apache.camel:camel-sjms: check the installed version with your package manager.
- Maven org.apache.camel:camel-google-pubsub: check the installed version with your package manager.
- Maven org.apache.camel:camel-coap: 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-jms, org.apache.camel:camel-sjms, org.apache.camel:camel-google-pubsub, org.apache.camel:camel-coap.
- 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-jg2m-9x48-3gvj (GitHub-reviewed advisory GHSA-jg2m-9x48-3gvj lists affected ranges: Maven org.apache.camel:camel-coap >=3.0.0 =4.15.0 =4.19.0 =3.0.0 =4.15.0 =4.19.0 =3.0.0 =4.15.0 =4.19.0 =3.0.0 =4.15.0 =4.19.0 <4.20.0)

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