CVE-2026-33453
CriticalApache camel-coap allows header injection that can lead to remote code execution
Published Apr 27, 2026 · Updated Oct 8, 2026 · Also known as GHSA-695c-x5gc-94gj
Key Facts
Patch in the next maintenance window- CVE-2026-33453 is a critical-severity vulnerability (CVSS 10.0 v3.1) affecting Camel (Apache), org.apache.camel:camel-coap (maven), camel-coap (redhat).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 7.2% probability of exploitation in the next 30 days.
- Fixed versions are available, including Camel 4.14.5, org.apache.camel:camel-coap 4.14.6, org.apache.camel:camel-coap 4.18.1.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
CVSS v3.1
10.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
7.2%
Higher than 94.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2026-33453 brief as a PDF
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Description
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Apache Camel Camel-Coap component.
Apache Camel's camel-coap component is vulnerable to Camel message header injection, leading to remote code execution when routes forward CoAP requests to header-sensitive producers (e.g. camel-exec)
The camel-coap component maps incoming CoAP request URI query parameters directly into Camel Exchange In message headers without applying any HeaderFilterStrategy. Specifically, CamelCoapResource.handleRequest() iterates over OptionSet.getUriQuery() and calls camelExchange.getIn().setHeader(...) for every query parameter. CoAPEndpoint extends DefaultEndpoint rather than DefaultHeaderFilterStrategyEndpoint, and CoAPComponent does not implement HeaderFilterStrategyComponent; the component contains no references to HeaderFilterStrategy at all.
As a result, an unauthenticated attacker who can send a single CoAP UDP packet to a Camel route consuming from coap:// can inject arbitrary Camel internal headers (those prefixed with Camel*) into the Exchange. When the route delivers the message to a header-sensitive producer such as camel-exec, camel-sql, camel-bean, camel-file, or template components (camel-freemarker, camel-velocity), the injected headers can alter the producer's behavior. In the case of camel-exec, the CamelExecCommandExecutable and CamelExecCommandArgs headers override the executable and arguments configured on the endpoint, resulting in arbitrary OS command execution under the privileges of the Camel process.
The producer's output is written back to the Exchange body and returned in the CoAP response payload by CamelCoapResource, giving the attacker an interactive RCE channel without any need for out-of-band exfiltration.
Exploitation prerequisites are minimal: a single unauthenticated UDP datagram to the CoAP port (default 5683). CoAP (RFC 7252) has no built-in authentication, and DTLS is optional and disabled by default. Because the protocol is UDP-based, HTTP-layer WAF/IDS controls do not apply. This issue affects Apache Camel: from 4.14.0 through 4.14.5, from 4.18.0 before 4.18.1, 4.19.0.
Users are recommended to upgrade to version 4.18.1 or 4.19.0, fixing the issue.
Affected Products
6 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| CamelApache | 4.18.0, 4.19.0 | 4.14.5 |
| org.apache.camel:camel-coapmaven | >= 4.14.0 | 4.18.1 |
| camel-coapredhat | See advisory | n/a |
Patched Releases
Camel
4.14.5
org.apache.camel:camel-coap
4.14.6, 4.18.1
Timeline
Publicly disclosed
Apr 27, 2026
Last updated
Oct 8, 2026
Weakness Type
- CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
References
- advisoryRHSA-2026:17668
- advisoryhttps://camel.apache.org/security/CVE-2026-33453.html
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33453.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-33453
FAQ
Common Questions.
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Apache Camel Camel-Coap component.
Affected: Camel (Apache) versions 4.18.0, 4.19.0; org.apache.camel:camel-coap (maven) versions >= 4.14.0; camel-coap (redhat). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Camel 4.14.5, org.apache.camel:camel-coap 4.14.6, org.apache.camel:camel-coap 4.18.1.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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