What is CVE-2026-40453?

CVE-2026-40453 is a critical-severity vulnerability in Apache Camel, classified under Improper Handling of Case Sensitivity. CVSS score: 9.9/10. Published 2026-04-27.

How severe is CVE-2026-40453?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Vulnerability in Apache Camel

CVE-2026-40453

The fix for CVE-2025-27636 added setLowerCase(true) to HttpHeaderFilterStrategy so that case-variant header names such as 'CAmelExecCommandExecutable' are filtered out alongside 'CamelExecCommandExecutable'. The same setLowerCase(true) cal…

EPSS: 0.002 (45.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Apache Camel — versions 4.19.0
Apache Software Foundation Camel Coap — versions 3.0.0, 4.15.0, 4.19.0
Apache Software Foundation Camel Google Pubsub — versions 3.0.0, 4.15.0, 4.19.0
Apache Software Foundation Camel Jms — versions 3.0.0, 4.15.0, 4.19.0

Weakness classification (CWE)

CWE-178 — Improper Handling of Case Sensitivity

References

security@apache.org (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40453?: CVE-2026-40453 is a critical-severity vulnerability in Apache Camel, classified under Improper Handling of Case Sensitivity. CVSS score: 9.9/10. Published 2026-04-27.
How severe is CVE-2026-40453?: Critical severity. CVSS v3 base score is 9.9 out of 10.