Severity: important
Affected versions:
- Apache Camel (org.apache.camel:camel-iggy) 4.17.0 before 4.18.3
- Apache Camel (org.apache.camel:camel-iggy) 4.19.0 before 4.21.0
Description:
Improper Input Validation, Exposure of Sensitive Information to an Unauthorized
Actor, Server-Side Request Forgery (SSRF) vulnerability in Apache Camel in Iggy
component.
The camel-iggy consumer mapped the user-headers of inbound Iggy messages into
the Camel Exchange header map without applying any HeaderFilterStrategy
(IggyFetchRecords copied the message user-headers straight into the Exchange).
Because nothing blocked the Camel header namespace, an actor able to publish to
the consumed Iggy stream/topic could set Camel-internal control headers -
including CamelHttpUri (Exchange.HTTP_URI) - simply by supplying them as
message user-headers. In a route where the Iggy consumer feeds a downstream
HTTP producer, the injected CamelHttpUri redirects the server-side HTTP request
to an attacker-chosen destination (server-side request forgery - for example to
an internal service or a cloud metadata endpoint). In addition, the HTTP
producer resolves Camel property placeholders on the resulting
(attacker-controlled) URI, so placeholders embedded in the injected value -
such as an environment-variable reference, an application property, or a vault
reference - are resolved to their real values and sent to the attacker,
disclosing environment variables, application properties and vault secrets.
This issue affects Apache Camel: from 4.17.0 before 4.18.3, from 4.19.0 before
4.21.0.
Users are recommended to upgrade to version 4.21.0, which fixes the issue. If
users are on the 4.18.x releases stream, then they are suggested to upgrade to
4.18.3. The fix adds a dedicated IggyHeaderFilterStrategy (and a
headerFilterStrategy endpoint option) that filters the Camel header namespace
case-insensitively on inbound mapping, so externally-supplied Camel* / camel*
headers are no longer copied into the Exchange. For deployments that cannot
upgrade immediately, strip the Camel control headers from the inbound message
before they reach any downstream producer (for example removeHeaders('Camel*')
and removeHeaders('camel*') at the start of the route), restrict who can
publish to the consumed Iggy stream/topic, and avoid bridging an untrusted
consumer directly into an HTTP producer whose target URI can be driven from
message headers.
Credit:
Kamalpreet Singh (finder)
Andrea Cosentino (remediation reviewer)
References:
https://camel.apache.org/security/CVE-2026-55994.html
https://camel.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-55994
