🛡️ Sentinel: [MEDIUM] Fix error message leakage

[matdev83]

🚨 Severity: MEDIUM
💡 Vulnerability: Exposed raw internal error messages in HTTP responses
🎯 Impact: Could leak internal implementation details or unexpected states
🔧 Fix: Replaced err.Error() with a generic error message
✅ Verification: Ran the existing test suite

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PR created automatically by Jules for task 17523149817371763483 started by @matdev83

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Review failed

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between ffac7a2 and cf9e5a1.

📒 Files selected for processing (2)

• internal/refbackend/openaicodex/server.go
• internal/refbackend/openaicodex/server_test.go

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Standardized HTTP and WebSocket responses for invalid headers to return a consistent, generic error message.

Walkthrough

Changes

Header validation responses

Layer / File(s)	Summary
Unify invalid header responses internal/refbackend/openaicodex/server.go	HTTP and WebSocket header-validation failures now return "invalid headers" instead of detailed validator errors.
Validate invalid header responses internal/refbackend/openaicodex/server_test.go	Tests verify the "invalid headers" body for HTTP requests and failed WebSocket upgrades with missing required headers.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 Pre-merge checks | ✅ 8

✅ Passed checks (8 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the security fix for error message leakage and is concise.
Description check	✅ Passed	The description accurately explains the vulnerability, impact, fix, and verification related to the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
No Secrets	✅ Passed	The commit only replaces two error responses with the literal "invalid headers"; added-line secret scanning found no credentials, keys, tokens, passwords, private keys, or sensitive URLs.
Context Propagation	✅ Passed	The patch only changes two HTTP error strings; it adds no context handling, cancellation paths, goroutines, or altered blocking behavior.
No Accidental Public Api Break	✅ Passed	Only internal/refbackend/openaicodex/server.go changed; no pkg/** files, exported declarations, signatures, fields, flags, or config keys changed. The response-text change is explicitly explained i...

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@internal/refbackend/openaicodex/server.go`:
- Line 139: Add regression coverage for the generic validation error contract in
both the HTTP endpoint and WebSocket upgrade path: assert the response status is
400 and the exact response body is “invalid headers”. Update the existing tests
covering these two request flows, ensuring internal validation details remain
hidden.

🪄 Autofix (Beta)

✅ Autofix completed

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Run ID: 65e3f424-c46c-4c02-b98c-84244a6a2a18

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Reviewing files that changed from the base of the PR and between 79605bb and ffac7a2.

📒 Files selected for processing (1)

• internal/refbackend/openaicodex/server.go

📜 Review details

⏰ Context from checks skipped due to timeout. (5)

• GitHub Check: Analyze (Go)
• GitHub Check: qa
• GitHub Check: Test (ubuntu-latest)
• GitHub Check: Test (macos-latest)
• GitHub Check: Test (windows-latest)

🧰 Additional context used

📓 Path-based instructions (4)

**/*.go

📄 CodeRabbit inference engine (Custom checks)

**/*.go: For server, CLI, worker, or network Go code, ensure context.Context is propagated correctly, cancellation is respected, and new goroutines cannot leak indefinitely.
Do not make accidental public API breaks in Go code: under pkg/** or anywhere exported Go identifiers are changed, warn if the PR changes exported types, function signatures, error behavior, JSON fields, CLI flags, config keys, or documented behavior without clearly explaining the compatibility impact.

**/*.go: Implement and describe Go behavior only; explicitly label Python-era or future behavior.
The core owns orchestration, routing, failover, and B2BUA continuity; provider semantics remain in adapters/plugins.
Core code must not import provider SDKs or concrete plugins.
Use canonical protocol adapters instead of pairwise protocol translators.
Streaming is primary; non-streaming APIs must collect the canonical stream.
Do not transparently retry or fail over after the first downstream content event.
Fail explicitly on capability mismatches; never silently drop required semantics.
Place request and response mutation behind hooks or extensions, not core branching.
Use explicit construction and registration; do not use DI containers, reflection registries, globals, or Go native plugin in v1.
Use specs for new features, breaking or architecture changes, protocol/plugin contract changes, routing semantic changes, or unclear requirements; use direct code for small fixes, documentation, narrow tests, and trivial maintenance.
If an active Kiro spec is in scope, do not code before approved requirements.md and design.md are recorded in spec.json.
Prefer the standard library and add dependencies only when they reduce complexity or risk.
Define small interfaces where consumed; constructors should return concrete types unless exposing stable SDK or plugin contracts.
Every I/O boundary must take context.Context; never store contexts in structs.
Own goroutines, channels, and cancellation ex...

Files:

• internal/refbackend/openaicodex/server.go

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⚙️ CodeRabbit configuration file

**/*.go: Review as production Go code. Prioritize correctness, race conditions, goroutine leaks, context cancellation, timeout handling, error wrapping, nil-pointer risks, resource cleanup, defer placement, API compatibility, interface design, dependency boundaries, and testability. Avoid generic style comments when gofmt/golangci-lint already covers the issue.

Files:

• internal/refbackend/openaicodex/server.go

**/*

📄 CodeRabbit inference engine (Custom checks)

Do not introduce hardcoded credentials, API keys, tokens, private keys, passwords, production secrets, or sensitive internal URLs.

**/*: Do not add changelog, _Updated, _Reason, timestamp, or history footers to steering or agent instructions.
Use TDD by default: write the test or interface before the implementation.
Prefer the smallest correct diff and avoid speculative abstractions.
Never claim success without direct verification evidence.
Preserve user-authored changes and never use destructive git commands unless explicitly requested.
Do not work on main; create a suitably named local worktree and fix/spec/feat branch based on main for each change.
Use forward-slash git pathspecs on Windows.
Reports must state changed files and verification run, and plainly state skipped tests or uncertainty; mention architectural trade-offs only when relevant.

Files:

• internal/refbackend/openaicodex/server.go

internal/refbackend/**/*.go

📄 CodeRabbit inference engine (AGENTS.md)

Keep reference backends, clients, stubs, fixtures, architecture tests, and QA helpers test-only.

Files:

• internal/refbackend/openaicodex/server.go

internal/**

⚙️ CodeRabbit configuration file

internal/**: Focus on package boundaries, hidden coupling, unexported API design, concurrency safety, deterministic behavior, and whether logic belongs in this internal package.

Files:

• internal/refbackend/openaicodex/server.go

🧠 Learnings (1)

📚 Learning: 2026-07-01T22:57:42.953Z

Learnt from: matdev83
Repo: matdev83/go-llm-interactive-proxy PR: 101
File: pkg/lipsdk/scope/context.go:0-0
Timestamp: 2026-07-01T22:57:42.953Z
Learning: In this repository, when defining unexported Go `context` key constants of type `ctxKey int` (e.g., `const ( kFoo ctxKey = iota + N )`), preserve the `iota + <offset>` pattern and keep the existing `<offset>` values rather than simplifying to plain `iota`. These per-package offsets are part of the repo-wide convention to avoid key collisions across packages, and each such constant set should include a short explanatory comment (for example: “offset avoids collision with other packages' context keys”).

Applied to files:

• internal/refbackend/openaicodex/server.go

[coderabbitai]

Note

Autofix is a beta feature. Expect some limitations and changes as we gather feedback and continue to improve it.

Fixes Applied Successfully

Fixed 1 file(s) based on 1 unresolved review comment.

Files modified:

• internal/refbackend/openaicodex/server_test.go

Commit: bed299d6a482aa2173faf42224c43cc708660148

The changes have been pushed to the sentinel-fix-error-leakage-17523149817371763483 branch.

Time taken: 7m 35s