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googleGeminiBaseUrl is user-editable (settings, imported profiles) and the @google/genai client keeps API-key authentication for custom endpoints, so a cleartext base URL would send the API key over an insecure endpoint (CWE-319). Validate the endpoint before any request in createMessage and completePrompt: HTTPS is required; plain HTTP is accepted only for loopback test proxies (localhost, [::1], and literal 127.0.0.0/8 IPv4 hosts). Hostnames that merely resemble the loopback range (127.example.test, 127.0.0.a, 127.0.0.1.a, foo127.bar) or fall outside it (10.0.0.1) are rejected, as are non-HTTP schemes such as ftp://localhost and malformed URLs. Violations surface as a structured ApiProviderError before the request is built, so the key never leaves the process. Carved out of the abort-signal provider rollout (fork PR 1303) at the maintainer's request so the endpoint policy can be reviewed independently of the cancellation changes.
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| Check name | Status | Explanation | Resolution |
|---|---|---|---|
| Regression Evidence |  |
The new URL guard has focused tests for malformed input only through createMessage (src/api/providers/__tests__/gemini.spec.ts:968-1003). completePrompt also calls assertSecureGeminiBaseUrl in… |
Add a focused completePrompt test for a malformed googleGeminiBaseUrl. Assert the localized completion error contains Invalid Google Gemini base URL (not a valid URL), assert generateContent is not called, and verify the wrapped tel… |
| Description check | |
The description clearly explains the security issue, implementation, allowed loopback exceptions, tests, and verification results. However, it omits the required Related GitHub Issue section and the P… | Add the required Related GitHub Issue section with an approved issue number, complete the Pre-Submission Checklist, and include the Documentation Updates section with the applicable option selected. |
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Check name Status Explanation Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request. Security Boundaries No changed path meets the failure condition. In src/api/providers/gemini.ts, bothcreateMessageandcompletePromptparsegoogleGeminiBaseUrlbefore building or sending a request. They allow `h…Persistence Integrity No changed persistence path exists. The runtime change in src/api/providers/gemini.tsonly validatesgoogleGeminiBaseUrlbeforegenerateContentStreamorgenerateContent; it adds no state write…Lifecycle Resource Cleanup PASS. The changed executable path only adds URL parsing and early validation in GeminiHandler.createMessageandcompletePrompt. The guard runs before request construction and allocates no listener…Title check The title clearly and concisely describes the main change: requiring HTTPS for custom Google Gemini base URLs and identifying the CWE-319 security issue. Full details: Security Boundaries
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Explanation
No changed path meets the failure condition. In
src/api/providers/gemini.ts, bothcreateMessageandcompletePromptparsegoogleGeminiBaseUrlbefore building or sending a request. They allowhttps:or narrowly allow HTTP loopback hosts, and reject malformed URLs, other schemes, and non-loopback HTTP hosts. The URL is then passed to the client only after this check. The other changed production files alter comments or lint configuration only.
Full details: Persistence Integrity
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Explanation
No changed persistence path exists. The runtime change in
src/api/providers/gemini.tsonly validatesgoogleGeminiBaseUrlbeforegenerateContentStreamorgenerateContent; it adds no state write, storage update, default propagation, rollback, or persistence operation. The other production diffs change comments, lint configuration, or remove a comment. Tests and documentation do not persist state.
Full details: Lifecycle Resource Cleanup
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Explanation
PASS. The changed executable path only adds URL parsing and early validation in
GeminiHandler.createMessageandcompletePrompt. The guard runs before request construction and allocates no listener, watcher, timer, task, or provider resource. Other changed runtime lines only shorten comments, remove a suppression comment, or add lint configuration. No changed lifecycle path can leak a resource or duplicate work after cancellation, disposal, or restart.
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Full details: Regression Evidence
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Explanation
The new URL guard has focused tests for malformed input only through
createMessage(src/api/providers/__tests__/gemini.spec.ts:968-1003).completePromptalso callsassertSecureGeminiBaseUrlinside its error-wrapping path (src/api/providers/gemini.ts:654-658), but no test sends a malformed URL through that public entry point. The existingcompletePromptmatrix covers parseable insecure URLs, not thenew URL()failure branch.Resolution
Add a focused
completePrompttest for a malformedgoogleGeminiBaseUrl. Assert the localized completion error containsInvalid Google Gemini base URL (not a valid URL), assertgenerateContentis not called, and verify the wrapped telemetry error if that path is part of the contract.
Full details: Description check
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Explanation
The description clearly explains the security issue, implementation, allowed loopback exceptions, tests, and verification results. However, it omits the required Related GitHub Issue section and the Pre-Submission Checklist, including issue linkage and documentation-impact confirmation.
Resolution
Add the required Related GitHub Issue section with an approved issue number, complete the Pre-Submission Checklist, and include the Documentation Updates section with the applicable option selected.
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Review comments at @src/utils/pathUtils.ts:
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What this does
googleGeminiBaseUrlis user-editable (settings, imported profiles), and the@google/genaiclient keeps API-key authentication for custom endpoints. Before this PR a cleartext custom base URL was accepted as-is, so the API key could be sent over an insecure endpoint (CWE-319).This PR validates the custom endpoint before any request is built, in both
createMessageandcompletePrompt:http://localhost,http://[::1], and literal127.0.0.0/8IPv4 hosts.127.example.test,127.0.0.a,127.0.a.b,127.0.0.1.a,foo127.bar, and hosts outside the range such as10.0.0.1.ftp://localhost) and malformed URLs are rejected.ApiProviderError(provider/model/operation context) before the request is built, so the key never leaves the process.Content source
Carved out of the fork-side abort-signal provider rollout (fork PR #1303) at the maintainer's request: this endpoint policy changes which custom endpoints are accepted independently of cancellation, so separating it keeps that rollout reviewable. The helpers, guards, and security tests are ported from that rollout branch (the test block is re-nested to this file's structure); the rollout's timeout plumbing stays in that PR.
Budget
main.src/api/providers/gemini.ts(three module-private helpers plus two call-site guards); the remaining 513 lines are the security test matrix insrc/api/providers/__tests__/gemini.spec.ts.How to test
googleGeminiBaseUrltohttp://gemini.example.testand run any Gemini request → it fails with "Google Gemini base URL must use HTTPS (or a loopback HTTP endpoint for local test proxies)" before the request is sent.http://127.0.0.1:8080(orhttp://localhost,http://[::1]) → the request proceeds against the local proxy.src/:vitest run --globals api/providers/__tests__/gemini.spec.ts.Verification at this head
vitest run --globals --no-file-parallelism api/providers/__tests__/gemini.spec.ts api/providers/__tests__/gemini-handler.spec.ts→ 63/63 passed.gemini.tsguards turns exactly the 11 reject tests red while the 5 loopback-allow tests stay green in both directions; byte-exact restore returns all green.eslint --max-warnings=0on both changed files → 0 errors / 0 warnings; suppression counts unchanged.tsc --noEmit→ 0 errors.prettier --check→ clean.