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CVE-2026-33454

Full vulnerability record from the local CVENow database.

Description

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.

Severity
CRITICAL
CVSS score
9.4 (v3.1)
Vulnerability status
Modified
Source identifier
[email protected]
Published
2026-04-27 10:16:07.853000
Last modified
2026-10-26 22:10:00.163000
View original CVE JSON 
{
  "id": "CVE-2026-33454",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-27T10:16:07.853",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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).\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."
    },
    {
      "lang": "es",
      "value": "El componente Camel-Mail es vulnerable a la inyección de encabezados de mensajes de Camel. La estrategia de filtro de encabezados personalizada utilizada por el componente (MailHeaderFilterStrategy) solo filtra la dirección ’out’ a través de setOutFilterStartsWith, mientras que no configura la dirección ’in’ a través de setInFilterStartsWith. Como resultado, cuando una aplicación Camel consume correo a través de camel-mail (por ejemplo, a través de from(’imap://...’) o from(’pop3://...’)) se omite la verificación del filtro de entrada y los encabezados MIME con prefijo Camel se mapean sin filtrar en el Exchange. Un atacante que puede entregar un correo electrónico a un buzón monitoreado por dicho consumidor puede inyectar encabezados específicos de Camel que, para algunos componentes Camel posteriores al consumidor de correo (como camel-bean, camel-exec o camel-sql), pueden alterar el comportamiento de la ruta. Este es el mismo patrón que se abordó previamente en camel-undertow (CVE-2025-30177) y el filtro de encabezado de entrada más amplio (CVE-2025-27636 y CVE-2025-29891).\n\nEste problema afecta a Apache Camel: desde 3.0.0 antes de 4.14.6, desde 4.15.0 antes de 4.18.1.\n\nSe recomienda a los usuarios actualizar a la versión 4.19.0, que corrige el problema. Si los usuarios están en la rama de versiones LTS 4.18.x, se les sugiere actualizar a 4.18.1. Si los usuarios están en la rama de versiones LTS 4.14.x, se les sugiere actualizar a 4.14.6."
    }
  ],
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