# CVE-2026-40453 — Apache Camel JMS > As of 2026-06-29, CVE-2026-40453 is a CRITICAL-severity vulnerability in Apache Camel JMS, CVSS v3.1 9.9, EPSS 0.8% (54.2th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-40453, most recently “SAP July 2026 Patch Day: Critical Memory Corruption in NetWeaver ABAP (CVE-2026-44747, CVSS 9.9) Among 16 Security Notes”. **Last updated:** 2026-06-29 ## What is 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) 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. The record classifies CVE-2026-40453 under weakness class [CWE-178](https://cwe.mitre.org/data/definitions/178.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 3 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 139 days ago. ## Severity and exploitation probability - **CVSS v3.1 base score:** 9.9 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`) - **EPSS (FIRST):** 0.8% probability of exploitation in the next 30 days, higher than 54.2% of all scored CVEs - **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog - **Threadlinqs priority:** 9.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability - **Published:** 2026-04-27, last modified 2026-06-29 ## Is CVE-2026-40453 being exploited? Weaponised exploit code for CVE-2026-40453 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. - [oscerd/CVE-2026-40453](https://github.com/oscerd/CVE-2026-40453) (github) ## Affected products and versions - **Apache Software Foundation**: Apache Camel JMS, Apache Camel CoAP, Apache Camel Google PubSub Affected software packages: - `maven:org.apache.camel:camel-coap` — patched in 4.14.6 - `maven:org.apache.camel:camel-coap` — patched in 4.18.2 - `maven:org.apache.camel:camel-coap` — patched in 4.20.0 - `maven:org.apache.camel:camel-google-pubsub` — patched in 4.14.6 - `maven:org.apache.camel:camel-google-pubsub` — patched in 4.18.2 - `maven:org.apache.camel:camel-google-pubsub` — patched in 4.20.0 - `maven:org.apache.camel:camel-jms` — patched in 4.14.6 - `maven:org.apache.camel:camel-jms` — patched in 4.18.2 - `maven:org.apache.camel:camel-jms` — patched in 4.20.0 - `maven:org.apache.camel:camel-sjms` — patched in 4.14.6 - `maven:org.apache.camel:camel-sjms` — patched in 4.18.2 - `maven:org.apache.camel:camel-sjms` — patched in 4.20.0 ## How to fix CVE-2026-40453 Fixed versions are recorded for 12 packages: maven:org.apache.camel:camel-coap 4.14.6, maven:org.apache.camel:camel-coap 4.18.2, maven:org.apache.camel:camel-coap 4.20.0, maven:org.apache.camel:camel-google-pubsub 4.14.6, maven:org.apache.camel:camel-google-pubsub 4.18.2, maven:org.apache.camel:camel-google-pubsub 4.20.0, maven:org.apache.camel:camel-jms 4.14.6, maven:org.apache.camel:camel-jms 4.18.2, maven:org.apache.camel:camel-jms 4.20.0, maven:org.apache.camel:camel-sjms 4.14.6. Vendor advisory: [https://camel.apache.org/security/CVE-2026-40453.html](https://camel.apache.org/security/CVE-2026-40453.html). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory. ## Threat activity tracking CVE-2026-40453 1 tracked threat in the Threadlinqs corpus references CVE-2026-40453, either in the campaign’s CVE list or as an indicator on the campaign record. - [SAP July 2026 Patch Day: Critical Memory Corruption in NetWeaver ABAP (CVE-2026-44747, CVSS 9.9) Among 16 Security Notes](https://intel.threadlinqs.com/threat/TL-2026-1303) — CRITICAL · 2026-07-14 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-07-14. This product uses the NVD API but is not endorsed or certified by the NVD. **Vendor advisory and patch** - [camel.apache.org — vendor advisory](https://camel.apache.org/security/CVE-2026-40453.html) Canonical: https://intel.threadlinqs.com/cve/CVE-2026-40453 Full detection coverage and IOCs for threats exploiting CVE-2026-40453 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp