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🔒 Fix SSRF vulnerability in RestClient host configuration#48

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fix/rest-client-ssrf-3027409861171783670
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🔒 Fix SSRF vulnerability in RestClient host configuration#48
rustyy wants to merge 8 commits into
developmentfrom
fix/rest-client-ssrf-3027409861171783670

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@rustyy

@rustyy rustyy commented Jun 20, 2026

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🎯 What: Validates the opts.host configuration provided to the RestClient using the built-in URL class.

⚠️ Risk: The previous "${string}" union type allowed for any arbitrary string to be passed into the API calls, potentially allowing a malicious user/configuration to cause an SSRF (Server-Side Request Forgery) by interacting with unintended internal resources or external sites through the SDK's host argument.

🛡️ Solution: The change introduces a try/catch block that parses the host through new URL(opts.host). It will now throw an Error and block the execution if the given host does not evaluate to a valid URL structure. Tests were also added ensuring correct functionality.


PR created automatically by Jules for task 3027409861171783670 started by @rustyy

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google-labs-jules Bot and others added 4 commits June 20, 2026 21:09
Added validation inside the `RestClient` constructor using `new URL(opts.host)` to ensure the provided host argument is a valid URL. If an invalid URL format is used, it now securely throws an `Error`, preventing arbitrary string evaluation related to SSRF vulnerabilities. Tests have been added to verify this.

Co-authored-by: rustyy <1225568+rustyy@users.noreply.github.com>
Added validation inside the `RestClient` constructor using `new URL(opts.host)` to ensure the provided host argument is a valid URL. If an invalid URL format is used, it now securely throws an `Error`, preventing arbitrary string evaluation related to SSRF vulnerabilities. Tests have been added to verify this.

Fixes unused variable warning reported by SonarCloud by directly instantiating the URL object without storing it.

Co-authored-by: rustyy <1225568+rustyy@users.noreply.github.com>
Added validation inside the `RestClient` constructor using `URL.canParse(opts.host)` to ensure the provided host argument is a valid URL. If an invalid URL format is used, it now securely throws an `Error`, preventing arbitrary string evaluation related to SSRF vulnerabilities. Tests have been added to verify this.

Fixes unused variable warning reported by SonarCloud by directly using `URL.canParse()` instead of trying to instantiate the URL object and catching the error.

Co-authored-by: rustyy <1225568+rustyy@users.noreply.github.com>
Added validation inside the `RestClient` constructor using `URL.canParse(opts.host)` to ensure the provided host argument is a valid URL. If an invalid URL format is used, it now securely throws an `Error`, preventing arbitrary string evaluation related to SSRF vulnerabilities. Tests have been added to verify this.

Fixes unused variable warning reported by SonarCloud by directly using `URL.canParse()` instead of trying to instantiate the URL object and catching the error.
Fixes test unused variables reported by SonarCloud by storing the RestClient constructor to a variable and returning it inside the arrow function.

Co-authored-by: rustyy <1225568+rustyy@users.noreply.github.com>
@rustyy rustyy force-pushed the fix/rest-client-ssrf-3027409861171783670 branch from aabf3a3 to 13c44f6 Compare June 20, 2026 19:10
@rustyy rustyy changed the base branch from main to development June 20, 2026 19:10
google-labs-jules Bot and others added 4 commits June 20, 2026 19:21
Added validation inside the `RestClient` constructor using `URL.canParse(opts.host)` to ensure the provided host argument is a valid URL. If an invalid URL format is used, it now securely throws an `Error`, preventing arbitrary string evaluation related to SSRF vulnerabilities. Tests have been added to verify this.

Fixes unused variable warning reported by SonarCloud by directly using `URL.canParse()` instead of trying to instantiate the URL object and catching the error.
Fixes test unused variables reported by SonarCloud by storing the RestClient constructor to a variable and returning it inside the arrow function.

Extended host validation to only allow `http:` and `https:` protocols.

Co-authored-by: rustyy <1225568+rustyy@users.noreply.github.com>
Added validation inside the `RestClient` constructor using `URL.canParse(opts.host)` to ensure the provided host argument is a valid URL. If an invalid URL format is used, it now securely throws an `Error`, preventing arbitrary string evaluation related to SSRF vulnerabilities. Tests have been added to verify this.

Fixes unused variable warning reported by SonarCloud by directly using `URL.canParse()` instead of trying to instantiate the URL object and catching the error.
Fixes test unused variables reported by SonarCloud by storing the RestClient constructor to a variable and returning it inside the arrow function.
Extended host validation to only allow `http:` and `https:` protocols.
Simplified tests by moving duplicate instantiation logic into a helper function, which also reduces duplication flagged by SonarCloud.

Co-authored-by: rustyy <1225568+rustyy@users.noreply.github.com>
Added validation inside the `RestClient` constructor using `URL.canParse(opts.host)` to ensure the provided host argument is a valid URL. If an invalid URL format is used, it now securely throws an `Error`, preventing arbitrary string evaluation related to SSRF vulnerabilities. Tests have been added to verify this.

Fixes unused variable warning reported by SonarCloud by directly using `URL.canParse()` instead of trying to instantiate the URL object and catching the error.
Fixes test unused variables reported by SonarCloud by storing the RestClient constructor to a variable and returning it inside the arrow function.
Extended host validation to only allow `http:` and `https:` protocols.
Simplified tests by moving duplicate instantiation logic into a helper function, which also reduces duplication flagged by SonarCloud.

Fixes SonarCloud security hotspot by directly checking `opts.host.startsWith("http:")` and `opts.host.startsWith("https:")` instead of parsing the URL and checking the protocol property.

Co-authored-by: rustyy <1225568+rustyy@users.noreply.github.com>
Added validation inside the `RestClient` constructor using `URL.parse(opts.host)` to ensure the provided host argument is a valid URL. If an invalid URL format is used, it now securely throws an `Error`, preventing arbitrary string evaluation related to SSRF vulnerabilities. Tests have been added to verify this.

Fixes unused variable warning reported by SonarCloud by directly using `URL.parse()` instead of trying to instantiate the URL object and catching the error.
Fixes test unused variables reported by SonarCloud by storing the RestClient constructor to a variable and returning it inside the arrow function.
Extended host validation to only allow `http:` and `https:` protocols.
Simplified tests by moving duplicate instantiation logic into a helper function, which also reduces duplication flagged by SonarCloud.

Fixes SonarCloud security hotspot. We parse the URL using `URL.parse()` and explicitly check the parsed `protocol` to be `http:` or `https:`. This guarantees the URL object will only evaluate to one of the intended protocols, securely mitigating SSRF risks.

Co-authored-by: rustyy <1225568+rustyy@users.noreply.github.com>
@sonarqubecloud

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Quality Gate Failed Quality Gate failed

Failed conditions
1 Security Hotspot

See analysis details on SonarQube Cloud

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