Deserialization of untrusted data in Apache Camel
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · Low
- Fix status
- Partial Red Hat: 2 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-502.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Camel | 3.0.0 to before 4.14.6; 4.15.0 to before 4.18.1 | 4.14.6, 4.18.1 | Patch available | CNA |
| — | org.apache.camel:camel-mail (Maven) | 3.0.0 to before 4.14.6 | 4.14.6 | Patch available | GHSA-2vqf-x7g4-7c2g |
| — | org.apache.camel:camel-mail (Maven) | 4.15.0 to before 4.18.1 | 4.18.1 | Patch available | GHSA-2vqf-x7g4-7c2g |
- Apache Camel VendorApache Affected 3.0.0 to before 4.14.6; 4.15.0 to before 4.18.1 Fixed in 4.14.6, 4.18.1 Patch available CNA
- org.apache.camel:camel-mail (Maven) Vendor— Affected 3.0.0 to before 4.14.6 Fixed in 4.14.6 Patch available GHSA-2vqf-x7g4-7c2g
- org.apache.camel:camel-mail (Maven) Vendor— Affected 4.15.0 to before 4.18.1 Fixed in 4.18.1 Patch available GHSA-2vqf-x7g4-7c2g
Remediation
- Fix · CNA Apache Camel (Apache Software Foundation) Fixed in 4.14.6, 4.18.1
- Fix · GHSA-2vqf-x7g4-7c2g org.apache.camel:camel-mail (Maven) Fixed in 4.14.6 Advisory →
- Fix · GHSA-2vqf-x7g4-7c2g org.apache.camel:camel-mail (Maven) Fixed in 4.18.1 Advisory →
Red Hat 2 advisories
- RHSA-2026:19835 Released 2026-05-20 · Red Hat rating CriticalRed Hat Build of Apache Camel 4.14 for Quarkus 3.27 update is now available (RHBQ 3.27.3.SP2)
- Red Hat Build of Apache Camel 4.14 for Quarkus 3.27
- RHSA-2026:17668 Released 2026-05-14 · Red Hat rating CriticalRed Hat Build of Apache Camel 4.18.1 for Spring Boot release.
- Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Apache Camel 4.14.6, 4.18.1
2 records Highest priority Priority MEDIUM 2 MEDIUM
Other records, highest priority first
- TI-2026-21614 Deserialization of untrusted data in Apache CamelPriority MEDIUM 43
Vendor assessments
Red Hat
Red Hat rating: Critical. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat build of Apache Camel 4 for Quarkus 3 | Affected | No fix yet |
| Red Hat Build of Apache Camel 4.14 for Quarkus 3.27 | Fixed | RHSA-2026:19835 |
| Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14 | Fixed | RHSA-2026:17668 |
Not affected: 8 products
- Red Hat Fuse 7
- Red Hat JBoss Enterprise Application Platform 7
- Red Hat JBoss Enterprise Application Platform 8
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat Process Automation 7
- Red Hat build of Apache Camel - HawtIO 4
- Red Hat build of Apache Camel 4 for Quarkus 3
- Red Hat build of Apache Camel for Spring Boot 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33454
- 2026-10-03 Alias added: GHSA-2vqf-x7g4-7c2g
- 2026-10-05 Weakness changed · GHSA-2vqf-x7g4-7c2g
- 2026-10-05 4 new references · GHSA-2vqf-x7g4-7c2g
- 2026-10-09 Fix available: RHSA-2026:19835 · Red Hat
- 2026-10-10 Fix available: Red Hat Build of Apache Camel 4.14 for Quarkus 3.27 · Red Hat
References
Advisory 2
Other 19
- https://github.com/apache/camel/pull/22152
- https://github.com/apache/camel/pull/22151
- https://github.com/apache/camel/pull/22150
- https://github.com/apache/camel/pull/22149
- https://github.com/apache/camel/pull/22148
- https://github.com/apache/camel/pull/22147
- https://github.com/apache/camel/pull/22146
- https://github.com/apache/camel/commit/e074c01a719cccf3b1c2efbd2ff31e60fd6220ce
- https://github.com/apache/camel/commit/5c20de8f047de725e0b32a874cdb5108c3e46558
- https://github.com/apache/camel/commit/540d48e1cb5e492bd1c74bfc5a6e929fcf24fe3b
- https://github.com/apache/camel/commit/3926ab2b7745e36da2cd8e0dc019018bc415aff9
- https://github.com/apache/camel/commit/05cffa5ec05ff2ec3c50a77825625da6e426e7a8
- https://github.com/apache/camel/commit/0307dd4709a8136eba3206701004bcb528bc47fd
- https://github.com/apache/camel
- https://bugzilla.redhat.com/show_bug.cgi?id=2463181
- https://access.redhat.com/security/cve/CVE-2026-33454
- https://access.redhat.com/errata/RHSA-2026:19835
- https://issues.apache.org/jira/browse/CAMEL-23222
- https://access.redhat.com/errata/RHSA-2026:17668
More Apache Camel vulnerabilities
- TI-2026-76322 Unsafe deserialization in Apache Camel camel-hazelcast CVSS 4.0CRITICAL 10.0
- TI-2026-18973 Apache Camel: Camel-Keycloak: Cross-Realm Token Acceptance Bypass in KeycloakSecurityPolicy CVSS 3.1CRITICAL 9.1
- TI-2026-76339 Path traversal in Apache Camel azure-files component CVSS 3.1CRITICAL 9.1
- TI-2026-76330 Path traversal in Apache Camel FTP consumer escapes polled directory CVSS 3.1CRITICAL 9.1
- TI-2025-20435 Apache Camel: Camel Message Header Injection via Improper Filtering CVSS 3.1MEDIUM 5.6
- TI-2026-34899 Apache Camel: Camel-CXF Message Header Injection via Missing Inbound Filtering CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-33454 · CVE Program
- CVE-2026-33454 · NVD
- FIRST EPSS
- GHSA-2vqf-x7g4-7c2g · GitHub Advisory Database · CC BY 4.0
- CVE-2026-33454 · Red Hat security data · CC BY 4.0
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