CVE-2026-56140: CWE-20 Improper Input Validation in Apache Software Foundation Apache Camel AWS2 SNS
Improper Input Validation vulnerability in Apache Camel AWS SNS component. The camel-aws2-sns component filters Camel headers through a component-specific HeaderFilterStrategy, Sns2HeaderFilterStrategy. Like the sibling Sqs2HeaderFilterStrategy, it originally configured only an outbound filter (setOutFilterPattern, which blocks Camel*, breadcrumbId and org.apache.camel.* headers from being written out) and did not configure an inbound filter rule. For the related camel-aws2-sqs component this inbound gap was exploitable, because the Sqs2Consumer maps inbound SQS message attributes into the Camel Exchange via HeaderFilterStrategy.applyFilterToExternalHeaders, allowing a message sender to inject Camel control headers (tracked as CVE-2026-46456). camel-aws2-sns, by contrast, is producer-only: Sns2Endpoint does not support consumers (createConsumer throws UnsupportedOperationException, 'You cannot receive messages from this endpoint'), so no externally-supplied message attributes are ever mapped inbound into a Camel Exchange through SNS, and the missing inbound filter rule on Sns2HeaderFilterStrategy was therefore not reachable by an attacker. As part of the same fix (CAMEL-23506), an inbound filter rule (setInFilterStartsWith for the Camel namespace) was added to Sns2HeaderFilterStrategy so that its configuration matches the corrected Sqs2HeaderFilterStrategy and the other sibling strategies. This is a defense-in-depth alignment with no known exploit path in camel-aws2-sns. 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. This is a defense-in-depth hardening change with no known exploit path in camel-aws2-sns, which is producer-only, so no urgent action or workaround is required. Users who want the aligned behaviour can upgrade to version 4.21.0, or to 4.14.8 on the 4.14.x LTS releases stream, or to 4.18.3 on the 4.18.x releases stream, which contain the change. As a general best practice, operators should continue to apply least-privilege IAM permissions on their SNS topics.
AI Analysis
Technical Summary
The Apache Camel AWS2 SNS component originally configured only an outbound header filter and lacked an inbound filter rule, similar to a related issue in the camel-aws2-sqs component that was exploitable. However, since the SNS component is producer-only and does not support consumers, no inbound message attributes are mapped into Camel Exchanges, making the missing inbound filter unreachable by attackers. The fix (CAMEL-23506) added an inbound filter rule to the Sns2HeaderFilterStrategy to align with sibling components, enhancing defense-in-depth without addressing an active exploit path. Affected versions include 4.0.0 before 4.14.8, 4.15.0 before 4.18.3, and 4.19.0 before 4.21.0.
Potential Impact
There is no known exploit path for this vulnerability in the Apache Camel AWS2 SNS component because it is producer-only and does not process inbound messages. The issue represents a potential input validation gap that was addressed as a defense-in-depth improvement. No active exploitation or impact has been reported.
Mitigation Recommendations
The vendor has released fixed versions (4.14.8, 4.18.3, and 4.21.0) that include the inbound filter rule addition for defense-in-depth alignment. Since there is no known exploit path, no urgent action or workaround is required. Users desiring the aligned behavior should upgrade to one of the fixed versions. Operators should continue to apply least-privilege IAM permissions on SNS topics as a best practice.
CVE-2026-56140: CWE-20 Improper Input Validation in Apache Software Foundation Apache Camel AWS2 SNS
Description
Improper Input Validation vulnerability in Apache Camel AWS SNS component. The camel-aws2-sns component filters Camel headers through a component-specific HeaderFilterStrategy, Sns2HeaderFilterStrategy. Like the sibling Sqs2HeaderFilterStrategy, it originally configured only an outbound filter (setOutFilterPattern, which blocks Camel*, breadcrumbId and org.apache.camel.* headers from being written out) and did not configure an inbound filter rule. For the related camel-aws2-sqs component this inbound gap was exploitable, because the Sqs2Consumer maps inbound SQS message attributes into the Camel Exchange via HeaderFilterStrategy.applyFilterToExternalHeaders, allowing a message sender to inject Camel control headers (tracked as CVE-2026-46456). camel-aws2-sns, by contrast, is producer-only: Sns2Endpoint does not support consumers (createConsumer throws UnsupportedOperationException, 'You cannot receive messages from this endpoint'), so no externally-supplied message attributes are ever mapped inbound into a Camel Exchange through SNS, and the missing inbound filter rule on Sns2HeaderFilterStrategy was therefore not reachable by an attacker. As part of the same fix (CAMEL-23506), an inbound filter rule (setInFilterStartsWith for the Camel namespace) was added to Sns2HeaderFilterStrategy so that its configuration matches the corrected Sqs2HeaderFilterStrategy and the other sibling strategies. This is a defense-in-depth alignment with no known exploit path in camel-aws2-sns. 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. This is a defense-in-depth hardening change with no known exploit path in camel-aws2-sns, which is producer-only, so no urgent action or workaround is required. Users who want the aligned behaviour can upgrade to version 4.21.0, or to 4.14.8 on the 4.14.x LTS releases stream, or to 4.18.3 on the 4.18.x releases stream, which contain the change. As a general best practice, operators should continue to apply least-privilege IAM permissions on their SNS topics.
CVSS v3.1
Score 9.8critical
Affected software
pkg:maven/Apache Software Foundation/org.apache.camel:camel-aws2-snsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Apache Camel AWS2 SNS component originally configured only an outbound header filter and lacked an inbound filter rule, similar to a related issue in the camel-aws2-sqs component that was exploitable. However, since the SNS component is producer-only and does not support consumers, no inbound message attributes are mapped into Camel Exchanges, making the missing inbound filter unreachable by attackers. The fix (CAMEL-23506) added an inbound filter rule to the Sns2HeaderFilterStrategy to align with sibling components, enhancing defense-in-depth without addressing an active exploit path. Affected versions include 4.0.0 before 4.14.8, 4.15.0 before 4.18.3, and 4.19.0 before 4.21.0.
Potential Impact
There is no known exploit path for this vulnerability in the Apache Camel AWS2 SNS component because it is producer-only and does not process inbound messages. The issue represents a potential input validation gap that was addressed as a defense-in-depth improvement. No active exploitation or impact has been reported.
Mitigation Recommendations
The vendor has released fixed versions (4.14.8, 4.18.3, and 4.21.0) that include the inbound filter rule addition for defense-in-depth alignment. Since there is no known exploit path, no urgent action or workaround is required. Users desiring the aligned behavior should upgrade to one of the fixed versions. Operators should continue to apply least-privilege IAM permissions on SNS topics as a best practice.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-19T09:56:29.381Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
Threat ID: 6a4b6cb027e9c797192526ac
Added to database: 07/06/2026, 08:52:00 UTC
Last enriched: 07/06/2026, 09:06:33 UTC
Last updated: 08/18/2026, 22:49:28 UTC
Views: 165
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