CVE-2026-46453 Apache CVE debrief

Who should care

Users of Apache Camel from version 4.3.0 before 4.14.8, from 4.15.0 before 4.18.3, and from 4.19.0 before 4.21.0 should be aware of this vulnerability. Affected operator, platform, vulnerability-management, and security-team impact should be considered. Review compensating controls for exposed systems while remediation is scheduled and verified.

Technical summary

The camel-elasticsearch-rest-client component in Apache Camel reads several Exchange headers to control its behavior, including SEARCH_QUERY, OPERATION, INDEX_NAME, INDEX_SETTINGS, and ID. Due to the lack of a 'Camel' prefix in these header names, they are not blocked by the inbound HttpHeaderFilterStrategy. This allows an untrusted HTTP client to set these headers directly and override the query and operation configured by the route author, potentially leading to unauthorized data access or modification. The fix renames the camel-elasticsearch-rest-client Exchange header constant string values to carry the Camel prefix.

Defensive priority

Medium priority due to the CVSS score of 5.3 and the potential for data exfiltration or unauthorized modification.

Recommended defensive actions

• Upgrade to Apache Camel version 4.21.0 or later.
• If using version 4.14.x, upgrade to 4.14.8.
• If using version 4.18.x, upgrade to 4.18.3.
• For deployments that cannot upgrade immediately, strip the affected headers (SEARCH_QUERY, OPERATION, INDEX_NAME, INDEX_SETTINGS, ID) from untrusted inbound messages before they reach the producer.
• Apply a custom HeaderFilterStrategy that blocks these names.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Evidence notes

The CVE record and NVD detail provide information on the vulnerability and affected versions. The Apache Camel security page offers mitigation advice. Affected deployments may exist in managed environments, requiring an owner for follow-up. Official advisories and CVE records should be reviewed to validate affected scope, severity, and vendor guidance. Compensating controls may be necessary for exposed systems while remediation is scheduled and verified.

Official resources