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Review reviewCritical

CVE-2026-33454

Apache Software Foundation Apache Camel, Red Hat Build of Apache Camel 4.14 for Quarkus 3.27, Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14

The Camel-Mail component is vulnerable to Camel message header injection. The custom header filter strategy used by the component (MailHeaderFilterStrategy) only filters the 'out' direction via setOutFilterStartsWith, while it does not configure the 'in' direction via setInFilterStartsWith. As a result, when a Camel application consumes mail through camel-mail (for example via from(\"imap://...\") or from(\"pop3://...\")) the inbound filter check is skipped and Camel-prefixed MIME headers are mapped unfiltered into the Exchange. An attacker who can deliver an email to a mailbox monitored by...

CVSS
9.4
EPSS
0.62%
46.3% percentile
CISA KEV
Not listed
Published
2026.04.27
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.62%
Technical severityCVSS 9.4

Vulnerability overview

The Camel-Mail component is vulnerable to Camel message header injection. The custom header filter strategy used by the component (MailHeaderFilterStrategy) only filters the 'out' direction via setOutFilterStartsWith, while it does not configure the 'in' direction via setInFilterStartsWith. As a result, when a Camel application consumes mail through camel-mail (for example via from(\"imap://...\") or from(\"pop3://...\")) the inbound filter check is skipped and Camel-prefixed MIME headers are mapped unfiltered into the Exchange. An attacker who can deliver an email to a mailbox monitored by...

Affected product and versions

Product
Apache Software Foundation Apache Camel, Red Hat Build of Apache Camel 4.14 for Quarkus 3.27, Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14
Affected versions
>= 3.0.0 < 4.14.6, >= 4.15.0 < 4.18.1
Fixed versions
4.14.6, 4.18.1

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Apache Software Foundation Apache Camel, Red Hat Build of Apache Camel 4.14 for Quarkus 3.27, Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE
CWE-1173, CWE-502