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 such a consumer can inject Camel-specific headers that, for some Camel components downstream of the mail consumer (such as camel-bean, camel-exec, or camel-sql), can alter the behaviour of the route. This is the same pattern that was previously addressed in camel-undertow (CVE-2025-30177) and the broader incoming-header filter (CVE-2025-27636 and CVE-2025-29891).
This issue affects Apache Camel: from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.1.
Users are recommended to upgrade to version 4.19.0, which fixes the issue. If users are on the 4.18.x LTS releases stream, then they are suggested to upgrade to 4.18.1. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.6.
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This is the same pattern that was previously addressed in camel-undertow (CVE-2025-30177) and the broader incoming-header filter (CVE-2025-27636 and CVE-2025-29891).\n\nThis issue affects Apache Camel: from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.1.\n\nUsers are recommended to upgrade to version 4.19.0, which fixes the issue. If users are on the 4.18.x LTS releases stream, then they are suggested to upgrade to 4.18.1. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.6."}],"metrics":[{"other":{"content":{"text":"important"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache","dateUpdated":"2026-04-27T09:42:39.799Z"},"references":[{"tags":["vendor-advisory"],"url":"https://camel.apache.org/security/CVE-2026-33454.html"}],"source":{"defect":["CAMEL-23222"],"discovery":"UNKNOWN"},"title":"Apache Camel: Inbound Header Filter Missing in MailHeaderFilterStrategy Allows Remote Code Execution via MIME Header Injection (CVE-2025-30177 Variant)","x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.4,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"LOW","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-04-27T14:56:56.696569Z","id":"CVE-2026-33454","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-27T14:57:50.182Z"}},{"affected":[{"cpes":["cpe:/a:redhat:apache_camel_quarkus:3.27"],"defaultStatus":"affected","product":"Red Hat Build of Apache Camel 4.14 for Quarkus 3.27","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:apache_camel_spring_boot:4.18"],"defaultStatus":"affected","product":"Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:camel_quarkus:3"],"defaultStatus":"affected","product":"Red Hat build of Apache Camel 4 for Quarkus 3","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:apache_camel_hawtio:4"],"defaultStatus":"unaffected","product":"Red Hat build of Apache Camel - HawtIO 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:camel_spring_boot:4"],"defaultStatus":"unaffected","product":"Red Hat build of Apache Camel for Spring Boot 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_fuse:7"],"defaultStatus":"unaffected","product":"Red Hat Fuse 7","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:7"],"defaultStatus":"unaffected","product":"Red Hat JBoss Enterprise Application Platform 7","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8"],"defaultStatus":"unaffected","product":"Red Hat JBoss Enterprise Application Platform 8","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jbosseapxp"],"defaultStatus":"unaffected","product":"Red Hat JBoss Enterprise Application Platform Expansion Pack","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:jboss_enterprise_bpms_platform:7"],"defaultStatus":"unaffected","product":"Red Hat Process Automation 7","vendor":"Red Hat"}],"datePublic":"2026-04-27T09:42:39.799Z","descriptions":[{"lang":"en","value":"A flaw was found in the Camel-Mail component. 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