CVE-2026-49365: CWE-209 Generation of Error Message Containing Sensitive Information in Apache Software Foundation Apache Camel
Generation of Error Message Containing Sensitive Information vulnerability in Apache Camel Netty HTTP component. The camel-netty-http HTTP server consumer exposes a muteException option that controls what is returned to the client when a route processing error occurs. This option defaulted to false because the backing field was an uninitialised primitive boolean (Java's default of false), whereas the other Camel HTTP server components (camel-http / camel-jetty / camel-servlet and camel-platform-http) default it to true. With muteException=false, when a request triggers an exception during route processing the consumer writes the full Throwable stack trace into the HTTP response body as text/plain (via DefaultNettyHttpBinding) instead of returning an empty body. Any unauthenticated client that can reach the endpoint and cause a processing error - for example by sending a malformed request body, an invalid parameter, or otherwise triggering a route-internal failure - therefore receives a complete Java stack trace. Such a stack trace can disclose sensitive internal information, including credentials embedded in exception messages, internal host names and IP addresses, filesystem paths, dependency and version details, database and class names, and the application's internal structure, which an attacker can use to plan further attacks. 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. For deployments that cannot upgrade immediately, set muteException=true explicitly on the camel-netty-http consumer (for example netty-http: http://0.0.0.0:8080/api?muteException=true , or globally via the camel.component.netty-http.configuration.mute-exception=true property), so that processing errors no longer return the stack trace to the client.
AI Analysis
Technical Summary
The Apache Camel Netty HTTP component has a vulnerability (CWE-209) where the muteException option defaults to false, causing the server to return full Java stack traces in HTTP responses when route processing errors occur. These stack traces may disclose sensitive information such as credentials, internal hostnames, IP addresses, filesystem paths, dependency versions, and application structure details. This exposure can aid attackers in planning further attacks. The vulnerability affects Apache Camel versions 4.0.0 through before 4.14.8, 4.15.0 through before 4.18.3, and 4.19.0 through before 4.21.0. The issue is fixed in versions 4.14.8, 4.18.3, and 4.21.0. Users unable to upgrade immediately can mitigate the risk by setting the muteException option to true, preventing stack traces from being returned to clients.
Potential Impact
Unauthenticated clients able to reach the vulnerable Apache Camel Netty HTTP endpoint can receive detailed Java stack traces upon triggering route processing errors. These stack traces may contain sensitive internal information such as credentials, internal hostnames and IP addresses, filesystem paths, dependency and version details, database and class names, and internal application structure. Disclosure of this information can facilitate further targeted attacks against the affected system.
Mitigation Recommendations
A fix is available in Apache Camel versions 4.14.8, 4.18.3, and 4.21.0. Users are strongly recommended to upgrade to one of these versions depending on their release stream. For users who cannot upgrade immediately, explicitly set the muteException option to true on the camel-netty-http consumer (e.g., netty-http:http://0.0.0.0:8080/api?muteException=true or globally via camel.component.netty-http.configuration.mute-exception=true) to prevent stack traces from being returned to clients.
CVE-2026-49365: CWE-209 Generation of Error Message Containing Sensitive Information in Apache Software Foundation Apache Camel
Description
Generation of Error Message Containing Sensitive Information vulnerability in Apache Camel Netty HTTP component. The camel-netty-http HTTP server consumer exposes a muteException option that controls what is returned to the client when a route processing error occurs. This option defaulted to false because the backing field was an uninitialised primitive boolean (Java's default of false), whereas the other Camel HTTP server components (camel-http / camel-jetty / camel-servlet and camel-platform-http) default it to true. With muteException=false, when a request triggers an exception during route processing the consumer writes the full Throwable stack trace into the HTTP response body as text/plain (via DefaultNettyHttpBinding) instead of returning an empty body. Any unauthenticated client that can reach the endpoint and cause a processing error - for example by sending a malformed request body, an invalid parameter, or otherwise triggering a route-internal failure - therefore receives a complete Java stack trace. Such a stack trace can disclose sensitive internal information, including credentials embedded in exception messages, internal host names and IP addresses, filesystem paths, dependency and version details, database and class names, and the application's internal structure, which an attacker can use to plan further attacks. 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. For deployments that cannot upgrade immediately, set muteException=true explicitly on the camel-netty-http consumer (for example netty-http: http://0.0.0.0:8080/api?muteException=true , or globally via the camel.component.netty-http.configuration.mute-exception=true property), so that processing errors no longer return the stack trace to the client.
Affected software
pkg:maven/Apache Software Foundation/org.apache.camel:camel-netty-httpRun 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 Netty HTTP component has a vulnerability (CWE-209) where the muteException option defaults to false, causing the server to return full Java stack traces in HTTP responses when route processing errors occur. These stack traces may disclose sensitive information such as credentials, internal hostnames, IP addresses, filesystem paths, dependency versions, and application structure details. This exposure can aid attackers in planning further attacks. The vulnerability affects Apache Camel versions 4.0.0 through before 4.14.8, 4.15.0 through before 4.18.3, and 4.19.0 through before 4.21.0. The issue is fixed in versions 4.14.8, 4.18.3, and 4.21.0. Users unable to upgrade immediately can mitigate the risk by setting the muteException option to true, preventing stack traces from being returned to clients.
Potential Impact
Unauthenticated clients able to reach the vulnerable Apache Camel Netty HTTP endpoint can receive detailed Java stack traces upon triggering route processing errors. These stack traces may contain sensitive internal information such as credentials, internal hostnames and IP addresses, filesystem paths, dependency and version details, database and class names, and internal application structure. Disclosure of this information can facilitate further targeted attacks against the affected system.
Mitigation Recommendations
A fix is available in Apache Camel versions 4.14.8, 4.18.3, and 4.21.0. Users are strongly recommended to upgrade to one of these versions depending on their release stream. For users who cannot upgrade immediately, explicitly set the muteException option to true on the camel-netty-http consumer (e.g., netty-http:http://0.0.0.0:8080/api?muteException=true or globally via camel.component.netty-http.configuration.mute-exception=true) to prevent stack traces from being returned to clients.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-05-29T16:50:08.917Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4b6cb027e9c79719252692
Added to database: 07/06/2026, 08:52:00 UTC
Last enriched: 07/06/2026, 09:07:12 UTC
Last updated: 07/07/2026, 02:21:28 UTC
Views: 9
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