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Highest advisory severityMedium 2 vendors · 2 advisories

CVE-2026-49098: Apache Camel: Improper Input Validation, Improper Neutralization of Special Elements in Output Used by a Downstream Component…

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

NVD detail CVE.org

CVE-2026-49098 key facts

CISA KEV
Not listed (catalog checked )
Highest advisory severity
Medium
CVSS base score
6.5 (Red Hat), 5.3 (Apache)
Fixed releases
  • Apache: 4.21.0, 4.14.8, 4.18.3
  • Red Hat: 4.21.0, 4.14, 4.14.8, 4.18, 4.18.3
Vendor advisories
2 from Apache, Red Hat
VulniPulse record
Published · Updated

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-49098; bulletin-wide values are not repeated here.

Is CVE-2026-49098 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-49098 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-49098?

Upgrade to a fixed release named by the vendor:

  • Apache: 4.21.0, 4.14.8, 4.18.3
  • Red Hat: 4.21.0, 4.14, 4.14.8, 4.18, 4.18.3
  • The control-header constants in KafkaConstants (for example OVERRIDE_TOPIC = kafka.OVERRIDE_TOPIC, OVERRIDE_TIMESTAMP = kafka.OVERRIDE_TIMESTAMP, PARTITION_KEY = kafka.PARTITION_KEY) used plain, non-Camel-prefixed values. camel-kafka's own KafkaHeaderFilterStrategy does filter the kafka.* namespace, but only on the Kafka-to-Exchange serialization boundary (reading Kafka record headers into the Exchange, and writing Exchange headers into a Kafka record); it does not apply to headers that arrive from an upstream consumer in a multi-component route. (Apache)
  • Users are recommended to upgrade to version 4.21.0, which fixes the issue. (Apache)
  • Strip the kafka.* headers from untrusted inbound messages before the Kafka producer (for example removeHeaders('kafka.*') at the start of the route), and set the target topic from a trusted source. (Red Hat)

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Vendor advisory comparison

Apache

1 advisory
  • Advisory severityMedium5.3

    Medium [CVE-2026-49098] Apache Camel: Improper Input Validation, Improper Neutralization of Special Elements in Output Used by a Downstream Component…

    CVE-2026-49098Source published Source updated

    Improper Input Validation, Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in Apache Camel Kafka Component. The camel-kafka producer can override its configured target topic at runtime from the kafka.OVERRIDE_TOPIC Exchange header: KafkaProducer.evaluateTopic() returns the header value in preference to the topic configured on the endpoint. The control-header constants in KafkaConstants (for example OVERRIDE_TOPIC = kafka.OVERRIDE_TOPIC, OVERRIDE_TIMESTAMP = kafka.OVERRIDE_TIMESTAMP, PARTITION_KEY = kafka.PARTITION_KEY) used plain, non-Camel-prefixed values. camel-kafka's own KafkaHeaderFilterStrategy does filter the kafka.* namespace, but only on the Kafka-to-Exchange serialization boundary (reading Kafka record headers…

    Affected products in this advisory
    • Apache Camel Kafka
    Source-reported affected versions
    • 4.0.0 through 4.14.8
    • 4.15.0 through 4.18.3
    • 4.19.0 through 4.21.0.
    Source-reported fixed versions
    • 4.21.0
    • 4.14.8
    • 4.18.3
    Mitigation guidance
    • The control-header constants in KafkaConstants (for example OVERRIDE_TOPIC = kafka.OVERRIDE_TOPIC, OVERRIDE_TIMESTAMP = kafka.OVERRIDE_TIMESTAMP, PARTITION_KEY = kafka.PARTITION_KEY) used plain, non-Camel-prefixed values. camel-kafka's own KafkaHeaderFilterStrategy does filter the kafka.* namespace, but only on the Kafka-to-Exchange serialization boundary (reading Kafka record headers into the Exchange, and writing Exchange headers into a Kafka record); it does not apply to headers that arrive from an upstream consumer in a multi-component route.
    • Users are recommended to upgrade to version 4.21.0, which fixes the issue.
    • If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.8.
    • If users are on the 4.18.x releases stream, then they are suggested to upgrade to 4.18.3.

    1 more entries in the full advisory.

    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityMedium6.5

    Medium [CVE-2026-49098] Message redirection and injection via header manipulation

    CVE-2026-49098Source published Source updated

    Improper Input Validation, Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in Apache Camel Kafka Component. The camel-kafka producer can override its configured target topic at runtime from the kafka.OVERRIDE_TOPIC Exchange header: KafkaProducer.evaluateTopic() returns the header value in preference to the topic configured on the endpoint. The control-header constants in KafkaConstants (for example OVERRIDE_TOPIC = kafka.OVERRIDE_TOPIC, OVERRIDE_TIMESTAMP = kafka.OVERRIDE_TIMESTAMP, PARTITION_KEY = kafka.PARTITION_KEY) used plain, non-Camel-prefixed values. camel-kafka's own KafkaHeaderFilterStrategy does filter the kafka.* namespace, but only on the Kafka-to-Exchange serialization boundary (reading Kafka record headers…

    Affected products in this advisory
    • Red Hat build of Apache Camel 4 for Quarkus 3
    • Red Hat build of Apache Camel for Spring Boot 4
    Source-reported affected versions
    • < 4.0.0
    • < 4.14.8
    • < 4.15.0
    • < 4.18.3

    2 more entries in the full advisory.

    Source-reported fixed versions
    • 4.21.0
    • 4.14
    • 4.14.8
    • 4.18

    1 more entries in the full advisory.

    Mitigation guidance
    • Strip the kafka.* headers from untrusted inbound messages before the Kafka producer (for example removeHeaders('kafka.*') at the start of the route), and set the target topic from a trusted source.
    Full advisory and evidenceOpen source bulletin

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