---
title: "CVE-2026-46456: Apache Camel-AWS2-SQS: Inbound message attributes are mapped into the Exchange without an inbound HeaderFilterStrategy, allowing a message sender to inject Camel control headers"
url: https://erroneo.us/security/cve/CVE-2026-46456/
description: "CVE-2026-46456 (org.apache.camel:camel-aws2-sqs (Maven)): Improper Input Validation vulnerability in Apache Camel AWS2-SQS Component. The camel-aws2-sqs…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-07-06
date_modified: 2026-08-28
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-46456"
kev: false
cvss: 9.8
epss: 0.00791
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-46456: Apache Camel-AWS2-SQS: Inbound message attributes are mapped into the Exchange without an inbound HeaderFilterStrategy, allowing a message sender to inject Camel control headers

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.8% , percentile 56: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 56% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.apache.camel:camel-aws2-sqs (Maven) >= 4.0.0, < 4.14.8, fixed in 4.14.8 ; org.apache.camel:camel-aws2-sqs (Maven) >= 4.15.0, < 4.18.3, fixed in 4.18.3 ; org.apache.camel:camel-aws2-sqs (Maven) >= 4.19.0, < 4.21.0, fixed in 4.21.0 . Check your lockfile, including transitive dependencies.

## What it is

Improper Input Validation vulnerability in Apache Camel AWS2-SQS Component. The camel-aws2-sqs component map inbound message attributes into the Camel Exchange through a component-specific HeaderFilterStrategy. Sqs2HeaderFilterStrategy configured only an outbound filter (setOutFilterPattern, which blocks Camel, breadcrumbId and org.apache.camel. headers being written to the broker) but did not configure an inbound filter. As a result, when Sqs2Consumer copies each SQS MessageAttribute into the Exchange via HeaderFilterStrategy.applyFilterToExternalHeaders, DefaultHeaderFilterStrategy applied no inbound rule and treated every header name as not filtered - including Camel-internal control headers such as CamelHttpUri, CamelFileName or CamelSqlQuery - copying them unmodified onto the Camel message. Any principal able to send messages to the consumed SQS queue (for example a cross-account sender or a lower-privileged in-account component holding sqs:SendMessage) could therefore set arbitrary Camel control headers that influence the behaviour of downstream producers in the route (for example redirecting an HTTP producer, changing a file name, or overriding a query); the injected headers also persist across internal direct, seda and vm hops. The concrete downstream impact depends on which producers the route uses. This issue affects Apache Camel: from 4.0.0 before 4.14.8, from 4.15.0 before 4.18.3, from 4.19.0 before 4.21.0. Users are recommended to upgrade to version 4.21.0, which fixes the issue. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.8. If users are on the 4.18.x releases stream, then they are suggested to upgrade to 4.18.3. The fix adds an inbound HeaderFilterStrategy rule to Sqs2HeaderFilterStrategy that filters the Camel header namespace case-insensitively on inbound mapping, so sender-supplied Camel / camel headers are no longer copied into the Exchange. For deployments that cannot upgrade immediately, strip the Camel control headers from inbound messages before they reach any downstream producer (for example removeHeaders('Camel') and removeHeaders('camel') at the start of the route), and restrict who may send to the consumed SQS queue by applying least-privilege sqs:SendMessage permissions on the queue resource policy.

## Affected packages

- Maven `org.apache.camel:camel-aws2-sqs` >= 4.0.0, < 4.14.8 → fixed: 4.14.8
- Maven `org.apache.camel:camel-aws2-sqs` >= 4.15.0, < 4.18.3 → fixed: 4.18.3
- Maven `org.apache.camel:camel-aws2-sqs` >= 4.19.0, < 4.21.0 → fixed: 4.21.0

## Affected products (CVE record)

- Apache Software Foundation Apache Camel: 4.0.0 < 4.14.8, 4.15.0 < 4.18.3, 4.19.0 < 4.21.0

## Severity

- CISA-ADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.79% probability of exploitation activity in the next 30 days; percentile 56.

## Sources

- [camel.apache.org](https://camel.apache.org/security/CVE-2026-46456.html)
- [GitHub Advisory GHSA-cmc3-hr79-8mmv](https://github.com/advisories/GHSA-cmc3-hr79-8mmv)
- [CVE.org record CVE-2026-46456](https://www.cve.org/CVERecord?id=CVE-2026-46456)
- [NVD entry CVE-2026-46456](https://nvd.nist.gov/vuln/detail/CVE-2026-46456)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/07/05/9)
- [github.com](https://github.com/apache/camel/pull/23221)
- [github.com](https://github.com/apache/camel/pull/23357)
- [github.com](https://github.com/apache/camel/pull/23373)
- [github.com](https://github.com/apache/camel/commit/5f57258fb33d33ef99df10594f8fe9f11d7c2b7e)
- [github.com](https://github.com/apache/camel/commit/7b334be0419839097a132d4ff3427fc4083e695e)
- [github.com](https://github.com/apache/camel/commit/b7f78292e747a28dbf5da444265557b5f9f3c1a1)
- [github.com](https://github.com/apache/camel/releases/tag/camel-4.14.8)
- [github.com](https://github.com/apache/camel/releases/tag/camel-4.18.3)
- [github.com](https://github.com/apache/camel/releases/tag/camel-4.21.0)
- [issues.apache.org](https://issues.apache.org/jira/browse/CAMEL-23506)

---
Source page: https://erroneo.us/security/cve/CVE-2026-46456/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt