PatchSiren cyber security CVE debrief

CVE-2026-40473 Apache CVE debrief

CVE-2026-40473 is a remote code execution vulnerability in Apache Camel's camel-mina component. The MinaConverter.toObjectInput(IoBuffer) type converter wraps an IoBuffer in a java.io.ObjectInputStream without applying any ObjectInputFilter or class-loading restrictions. This allows an attacker to send a crafted serialized Java object over the network to the MINA consumer port, triggering arbitrary code execution in the context of the application during readObject(). The issue affects Apache Camel versions from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.2, and from 4.19.0 before 4.20.0. Users are recommended to upgrade to version 4.20.0, which fixes the issue. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.6. If users are on the 4.18.x releases stream, then they are suggested to upgrade to 4.18.2.

Vendor: Apache
Product: Camel
CVSS: HIGH 8.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-04-27
Original CVE updated: 2026-07-15
Advisory published: 2026-04-27
Advisory updated: 2026-07-15

Who should care

Apache Camel users who have camel-mina as a TCP or UDP consumer and request conversion to ObjectInput should be concerned about this vulnerability. This includes users of Apache Camel versions 3.0.0 to 4.14.6, 4.15.0 to 4.18.2, and 4.19.0 to 4.20.0. Developers and administrators responsible for maintaining and securing Apache Camel-based applications should take immediate action to mitigate this vulnerability.

Technical summary

The MinaConverter.toObjectInput(IoBuffer) type converter in Apache Camel's camel-mina component is vulnerable to remote code execution. When a Camel route uses camel-mina as a TCP or UDP consumer and requests conversion to ObjectInput, an attacker can send a crafted serialized Java object over the network to the MINA consumer port. This triggers arbitrary code execution in the context of the application during readObject(). The vulnerability is caused by the lack of ObjectInputFilter or class-loading restrictions when wrapping an IoBuffer in a java.io.ObjectInputStream.

Defensive priority

High priority should be given to upgrading Apache Camel to version 4.20.0 or applying the recommended mitigations. Immediate action is necessary to prevent potential remote code execution attacks.

Recommended defensive actions

Upgrade Apache Camel to version 4.20.0
If on 4.14.x LTS releases stream, upgrade to 4.14.6
If on 4.18.x releases stream, upgrade to 4.18.2
Implement ObjectInputFilter or class-loading restrictions for MinaConverter.toObjectInput(IoBuffer)
Monitor and restrict incoming network traffic to MINA consumer ports

Evidence notes

The CVE-2026-40473 vulnerability was publicly disclosed on April 27, 2026, and last modified on June 30, 2026. The vulnerability affects Apache Camel versions from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.2, and from 4.19.0 before 4.20.0. The CVSS score is 8.8 with a severity of HIGH.

Sources and references

Verified primary and authoritative sources

CVE-2026-40473 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-40473

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-40473 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40473

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Mitigation or vendor reference
Unverified legacy reference

URL: https://camel.apache.org/security/CVE-2026-40473.html

[email protected] - Vendor Advisory
Source reference
Unverified legacy reference

URL: https://access.redhat.com/security/cve/CVE-2026-40473

0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Source reference
Unverified legacy reference

URL: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40473.json

0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.