Is CVE-2026-33454 actively exploited?

No active exploitation of CVE-2026-33454 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33454 be exploited remotely?

Yes. CVE-2026-33454 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33454?

CVE-2026-33454 has a CVSS score of 9.4 (CRITICAL).

HOME VULNERABILITIESCVE-2026-33454

CRITICAL

CVE-2026-33454

CWE-502Published: April 27, 2026· Updated: Apr 28, 2026

9.4

CVSS v3.1

EPSS:0.16%probability of exploitation in 30 daysPercentile:36.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-33454 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.4.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.