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CVE-2026-33454— Apache Camel: Inbound Header Filter Missing in MailHeaderFilterStrategy Allows Remote Code Execution via MIME Header Injection (CVE-2025-30177 Variant)

Quick assessment

Affected
Apache Software Foundation Apache Camel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Camel是美国阿帕奇（Apache）基金会的一套开源的基于Enterprise Integration Pattern(企业整合模式，简称EIP)的集成框架。该框架提供企业集成模式的Java对象（POJO）的实现，且通过应用程序接口来配置路由和中介的规则。 Apache Camel 3.0.0版本至4.14.6之前版本和4.15.0版本至4.18.1之前版本存在代码问题漏洞，该漏洞源于camel-mail组件中邮件标头过滤策略未配置入站过滤，可能导致攻击者通过注入Camel特定标头改变路由

AI Predicted 8.8 Difficulty: Easy EPSS 1.03% · P63

Affected Version Matrix 2

VendorProduct Version RangeStatus
Apache Software Foundation Apache Camel 3.0.0< 4.14.6 affected
4.15.0< 4.18.1 affected
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I. Basic Information for CVE-2026-33454

Vulnerability Information
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Vulnerability Title
Apache Camel: Inbound Header Filter Missing in MailHeaderFilterStrategy Allows Remote Code Execution via MIME Header Injection (CVE-2025-30177 Variant)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Camel 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Camel是美国阿帕奇（Apache）基金会的一套开源的基于Enterprise Integration Pattern(企业整合模式，简称EIP)的集成框架。该框架提供企业集成模式的Java对象（POJO）的实现，且通过应用程序接口来配置路由和中介的规则。 Apache Camel 3.0.0版本至4.14.6之前版本和4.15.0版本至4.18.1之前版本存在代码问题漏洞，该漏洞源于camel-mail组件中邮件标头过滤策略未配置入站过滤，可能导致攻击者通过注入Camel特定标头改变路由
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Camel 3.0.0 ~ 4.14.6 -

II. Public POCs for CVE-2026-33454

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III. Intelligence Information for CVE-2026-33454

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Vendor Advisories for CVE-2026-33454 (1)

Same Patch Batch · Apache Software Foundation · 2026-04-27 · 13 CVEs total

CVE-2026-41635 9.8 CRITICAL Apache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter
CVE-2026-41409 9.8 CRITICAL Apache MINA: CWE-502 Deserialization of Untrusted Data
CVE-2026-40473 Apache Camel Mina: Unsafe Deserialization in MinaConverter.toObjectInput() via TCP/UDP
CVE-2026-40048 Apache Camel PQC: Unsafe Deserialization from FileBasedKeyLifecycleManager
CVE-2026-40860 Apache Camel: Unsafe Deserialization of JMS ObjectMessage in camel-jms, camel-sjms, camel-
CVE-2026-40453 Apache Camel JMS, Apache Camel CoAP, Apache Camel Google PubSub: Incomplete fix for CVE-20
CVE-2026-40858 Apache Camel: Camel-Infinispan: Unsafe Deserialization in Remote Aggregation Repository
CVE-2026-40022 Apache Camel Platform HTTP Main: Authentication Bypass on Non-Root Context Paths in camel
CVE-2026-33453 Apache Camel: CoAP URI Query Parameter to Exchange Header Injection in camel-coap Allows S
CVE-2026-27172 Apache Camel: Unsafe Java deserialization in camel-consul ConsulRegistry allows arbitrary
CVE-2026-41081 Apache Storm Client: Anonymous principal assigned on TLS client certificate verification f
CVE-2026-40557 Apache Storm Prometheus Reporter: Disabling TLS verification for Prometheus Reporter also

IV. Related Vulnerabilities

Same product: Apache Camel
Same vendor: Apache Software Foundation
Same weakness: CWE-502

V. Comments for CVE-2026-33454

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