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CVE-2026-40453 critical CVSS 9.9

Vulnerability in org.apache.camel:camel-coap (CVE-2026-40453)

Summary

Vulnerability in org.apache.camel:camel-coap (CVE-2026-40453). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 4.20.0 or later.

Original description

The description as published by the source.

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) call was not applied to five non-HTTP HeaderFilterStrategy implementations: JmsHeaderFilterStrategy and ClassicJmsHeaderFilterStrategy in camel-jms, SjmsHeaderFilterStrategy in camel-sjms, CoAPHeaderFilterStrategy in camel-coap, and GooglePubsubHeaderFilterStrategy in camel-google-pubsub. Because those strategies use case-sensitive String.startsWith('Camel'/'camel') filtering while the Camel Exchange stores headers in a case-insensitive map, an attacker with JMS (or equivalent) producer access to the broker consumed by a Camel route can inject case-variant Camel internal headers, which are then resolved by downstream components such as camel-exec and camel-file using their canonical casing. This enables remote code execution and arbitrary file write on routes that forward JMS messages to header-driven components.

This issue affects Apache Camel: from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.2, 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.

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-40453 has been found in org.apache.camel:camel-coap.
Successful exploitation can lead to full system takeover. CVSS score: 9.9/10.
What to do: upgrade org.apache.camel:camel-coap to 4.20.0 or later.
If unsure, ask your IT team or search "org.apache.camel:camel-coap CVE-2026-40453" on the vendor's site.

CVE-2026-40453 (org.apache.camel:camel-coap) — CWE-178 / CVSS v3 9.9
Attack vector: remote (network-reachable) / no user interaction
Patched: 4.20.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-178) exists in org.apache.camel:camel-coap.

📍 Affected scope

Check the vendor advisory for the affected versions of org.apache.camel:camel-coap.

🔥 Severity

Severity: Critical (CVSS 9.9/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 4.20.0.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで org.apache.camel:camel-coap を使っているサービスとバージョンを洗い出す。

  2. 2
    Apply patch patch 
    Upgrade org.apache.camel:camel-coap to 4.20.0

    ステージング環境で 4.20.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

maven org.apache.camel:camel-coap
[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"4.20.0"}]}]
maven org.apache.camel:camel-google-pubsub
[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"4.20.0"}]}]
maven org.apache.camel:camel-jms
[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"4.20.0"}]}]
maven org.apache.camel:camel-sjms
[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"4.20.0"}]}]

References

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