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CVE-2026-33453 Apache CVE debrief

CVE-2026-33453 is a critical vulnerability in Apache Camel's camel-coap component. The vulnerability allows for remote code execution via Camel message header injection when routes forward CoAP requests to header-sensitive producers. The issue arises from the component mapping incoming CoAP request URI query parameters directly into Camel Exchange In message headers without applying any HeaderFilterStrategy. This vulnerability affects Apache Camel versions from 4.14.0 through 4.14.5, from 4.18.0 before 4.18.1, and version 4.19.0. Users are recommended to upgrade to version 4.18.1 or 4.19.0 to fix the issue.

Vendor
Apache
Product
Camel
CVSS
CRITICAL 10
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-27
Original CVE updated
2026-06-30
Advisory published
2026-04-27
Advisory updated
2026-06-30

Who should care

Organizations using Apache Camel, particularly those using the camel-coap component, should be aware of this vulnerability. The vulnerability's critical severity and ease of exploitation make it a high priority for patching. Apache Camel users should assess their exposure and apply the recommended fixes to prevent potential remote code execution attacks.

Technical summary

The CVE-2026-33453 vulnerability in Apache Camel's camel-coap component allows for remote code execution due to improper control of dynamically determined object attributes. The component fails to apply a HeaderFilterStrategy when mapping CoAP request URI query parameters to Camel Exchange In message headers. This oversight enables an unauthenticated attacker to inject arbitrary Camel internal headers, potentially altering the behavior of header-sensitive producers like camel-exec, leading to arbitrary OS command execution. The vulnerability is exacerbated by CoAP's lack of built-in authentication and the fact that it's a UDP-based protocol, making HTTP-layer WAF/IDS controls ineffective.

Defensive priority

This vulnerability has a critical CVSS score of 10 and allows for remote code execution, making it a high priority for defenders to patch. The ease of exploitation, combined with the potential impact, necessitates immediate attention from organizations using the affected versions of Apache Camel.

Recommended defensive actions

  • Upgrade Apache Camel to version 4.18.1 or 4.19.0.
  • Implement network segmentation to limit exposure of CoAP services.
  • Monitor CoAP services for suspicious activity.
  • Review and restrict access to CoAP endpoints.
  • Apply HeaderFilterStrategy to restrict header modifications.

Evidence notes

The CVE-2026-33453 vulnerability was publicly disclosed on April 27, 2026, and last modified on June 30, 2026. The vulnerability affects multiple versions of Apache Camel, and users are advised to upgrade to a patched version. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H, indicating a critical severity.

Official resources

This article is AI-assisted and based on the supplied source corpus.