FAQ-001100 - Lightning Message Channel Security / Security Review and Compliance

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Current FAQ

Question
What are the best practices for Lightning Message Service to pass security review and avoid failures?
Answer
To pass security review when using Lightning Message Service (LMS), follow these best practices: **Core Requirements:** 1. **Keep LMS Channels Private**: Ensure the LMS channel is private to your package by setting `isExposed` to `false`. Publicly exposed LMS channels are not allowed in managed packages because they pose security risks by not verifying the sender's trustworthiness. 2. **Restrict Access to Methods**: Avoid exposing publish or handle message methods in components that reference the LMS channel. This reduces the risk of unauthorized access or misuse. **Will isExposed=true Cause Failure?** Yes, using a Lightning Message Channel with `isExposed=true` can cause your security review to fail. It is recommended to set `isExposed` to `false` unless there is a specific need to expose it to other components within the same namespace. **Resolving Security Findings:** - Configure Lightning Message Channel's `isExposed` setting to `false` - If current channel has `isExposed=true`, create a new message channel with `isExposed=false` and update all references - This prevents unnecessary exposure and mitigates potential security risks **Why Channels Are Flagged:** Lightning Message Service channels are flagged when exposed because they can pose security risks. Exposing LMS channels in managed packages makes it challenging to verify sender trustworthiness, potentially leading to unauthorized access or data manipulation. **Alternative Solutions:** 3. **Provide Alternatives for Deprecated Channels**: If an LMS channel is deprecated, offer alternatives such as allowing customers to create their own exposed LMS channels for integration purposes. 4. **Limit Component Exposure**: Secure managed packages by restricting component exposure and ensuring all interactions with LMS channels are controlled and secure. **Additional Considerations:** - If component communication is necessary, consider secure alternatives like the `pubsub` module - Document security policies clearly - Ensure sensitive data is never communicated through exposed channels By adhering to these practices, you can align with security requirements for AppExchange packages and avoid review failures.

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Related Security Rules (click to view)
AvoidLmcIsExposedTrue
Question
What are the best practices for Lightning Message Service to pass security review and avoid failures?
Recommended Answer Update
To pass security review when using Lightning Message Service (LMS), follow these best practices: **Core Requirements:** 1. **Keep LMS Channels Private**: Ensure the LMS channel is private to your package by setting `isExposed` to `false`. Publicly exposed LMS channels aren't allowed in managed packages because they pose security risks by not verifying the sender's trustworthiness. 2. **Restrict Access to Methods**: Avoid exposing publish or handle message methods in components that reference the LMS channel. This reduces the risk of unauthorized access or misuse. **Will isExposed=true Cause Failure?** Yes, using a Lightning Message Channel with `isExposed=true` can cause your security review to fail. Set `isExposed` to `false` unless there's a specific need to expose it to other components within the same namespace. **Resolving Security Findings:** - Configure Lightning Message Channel's `isExposed` setting to `false` - If your current channel has `isExposed=true`, create a new message channel with `isExposed=false` and update all references - This prevents unnecessary exposure and mitigates potential security risks **Why Channels Are Flagged:** Lightning Message Service channels are flagged when exposed because they can pose security risks. Exposing LMS channels in managed packages makes it challenging to verify sender trustworthiness, potentially leading to unauthorized access or data manipulation. **Alternative Solutions:** 3. **Provide Alternatives for Deprecated Channels**: If an LMS channel is deprecated, offer alternatives such as allowing customers to create their own exposed LMS channels for integration purposes. 4. **Limit Component Exposure**: Secure managed packages by restricting component exposure and ensuring all interactions with LMS channels are controlled and secure. **Additional Considerations:** - If component communication is necessary, consider secure alternatives like the `pubsub` module - Document security policies clearly - Ensure sensitive data is never communicated through exposed channels By following these practices, you can align with security requirements for AppExchange packages and avoid review failures.
Reasoning
The FAQ content directly addresses Lightning Message Channel security, specifically the `isExposed` setting issue. I made minor improvements to enhance conversational tone and clarity while preserving all original information: 1. **Tone improvements**: Changed "are not allowed" to "aren't allowed" and "It is recommended" to "Set" for more conversational language 2. **Clarity enhancement**: Added "your" in "If your current channel has" for better readability 3. **Word choice refinement**: Changed "adhering to" to "following" for simpler language I selected the AvoidLmcIsExposedTrue rule because it directly matches the FAQ's core focus. The FAQ extensively discusses the `isExposed=true` setting for Lightning Message Channels and explains why this causes security review failures. Specifically, the FAQ states that "using a Lightning Message Channel with `isExposed=true` can cause your security review to fail" and provides detailed guidance on "Configure Lightning Message Channel's `isExposed` setting to `false`". This directly aligns with the AvoidLmcIsExposedTrue rule's purpose of flagging Lightning Message Channels with isExposed=true as a security concern.
Reasoning References