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This is appropriate for a later condition (A new feature allows users to upload documents to the same service.), but it does not directly resolve the initial need. Upload handling adds content and execution risk beyond file path access.

This response addresses a different condition: A web application echoes stored user profile text into HTML attributes without context-aware encoding. The present case requires the measure described by Canonicalize and validate paths against an approved base directory with least-privilege file access.

Alternate encodings and path forms can bypass simplistic string filtering. The proposal would not be defensible for this case.

This explains a later shift in requirements (A new feature allows users to upload documents to the same service.), not the failure of the current proposal.

This is an advantage of another design (Validate token audience and scopes and enforce resource ownership on each operation.), not the particular flaw of Strip only the literal substring './' from the request and trust all remaining input.

This is a limitation elsewhere: A backend API trusts an OAuth access token but accepts requests to arbitrary resource IDs without per-object authorization. It does not explain the deficiency of the specified proposed approach.

This other observation is relevant to: A backend API trusts an OAuth access token but accepts requests to arbitrary resource IDs without per-object authorization.

An approved change without an executed test cannot prove operating effectiveness. The needed evidence is Encoded traversal tests are denied and access remains within the intended directory.

This demonstrates controls in another circumstance: A web application echoes stored user profile text into HTML attributes without context-aware encoding.

This remains inappropriate: Alternate encodings and path forms can bypass simplistic string filtering.

This is a record of how the initial safeguard would be checked, not an action implementing the newly requested condition: Encoded traversal tests are denied and access remains within the intended directory.

This is the appropriate response to the original situation: Path traversal can escape intended directories even when file names appear harmless. It does not directly meet the new condition.

This response addresses a different condition: A backend API trusts an OAuth access token but accepts requests to arbitrary resource IDs without per-object authorization. The present case requires the measure described by Apply proper contextual output encoding and appropriate browser defenses at the rendering boundary.

SQL escaping protects a different interpreter and does not prevent XSS in HTML. The proposal would not be defensible for this case.

This is appropriate for a later condition (The app starts accepting rich-text comments with limited safe formatting.), but it does not directly resolve the initial need. Rich text requires controlled HTML parsing rather than simple unformatted text encoding.

This is an advantage of another design (Canonicalize and validate paths against an approved base directory with least-privilege file access.), not the particular flaw of Escape SQL quotes and assume the browser cannot execute injected markup.

This is a limitation elsewhere: A public API uses user-controlled path segments to read files directly from a shared storage directory. It does not explain the deficiency of the specified proposed approach.

This explains a later shift in requirements (The app starts accepting rich-text comments with limited safe formatting.), not the failure of the current proposal.

An approved change without an executed test cannot prove operating effectiveness. The needed evidence is Negative stored-XSS payloads render as inert text with no script execution.

This demonstrates controls in another circumstance: A backend API trusts an OAuth access token but accepts requests to arbitrary resource IDs without per-object authorization.

This other observation is relevant to: A public API uses user-controlled path segments to read files directly from a shared storage directory.

This is a record of how the initial safeguard would be checked, not an action implementing the newly requested condition: Negative stored-XSS payloads render as inert text with no script execution.

This is the appropriate response to the original situation: HTML and attribute contexts can turn untrusted text into executable browser code. It does not directly meet the new condition.

This remains inappropriate: SQL escaping protects a different interpreter and does not prevent XSS in HTML.

Signed identity is not authorization for another customer's object. The proposal would not be defensible for this case.

This is appropriate for a later condition (A support role needs audited temporary impersonation to resolve a ticket.), but it does not directly resolve the initial need. Support delegation introduces exceptional access that must be independently controlled.

This response addresses a different condition: A public API uses user-controlled path segments to read files directly from a shared storage directory. The present case requires the measure described by Validate token audience and scopes and enforce resource ownership on each operation.

This is a limitation elsewhere: A web application echoes stored user profile text into HTML attributes without context-aware encoding. It does not explain the deficiency of the specified proposed approach.

This explains a later shift in requirements (A support role needs audited temporary impersonation to resolve a ticket.), not the failure of the current proposal.

This is an advantage of another design (Apply proper contextual output encoding and appropriate browser defenses at the rendering boundary.), not the particular flaw of Treat any signed user token as permission to view every tenant's records.

Incorrect — it fails the original constraint. Signed identity is not authorization for another customer's object.

Incorrect — the measure Canonicalize and validate paths against an approved base directory with least-privilege file access. addresses a different case: A public API uses user-controlled path segments to read files directly from a shared storage directory.

Incorrect — this evidence applies to another case: A public API uses user-controlled path segments to read files directly from a shared storage directory. The specified requirement here is A backend API trusts an OAuth access token but accepts requests to arbitrary resource IDs without per-object authorization.