🛡️ Sentinel: [MEDIUM] Fix Slowloris (CWE-400) vulnerability

[euxaristia]

This PR fixes a Medium severity vulnerability (CWE-400: Slowloris) in http.Server by adding ReadHeaderTimeout configurations to prevent resource exhaustion attacks.

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PR created automatically by Jules for task 8093721826949726805 started by @euxaristia

Summary by CodeRabbit

• Security Improvements

  • Added a 10-second header-read timeout to OAuth callback servers.
  • Reduces exposure to slow, incomplete HTTP requests during login callbacks.

• Documentation

  • Added guidance documenting the timeout configuration and associated security risk.

[google-labs-jules]

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: a231dedf-ba4d-4e1e-8dc9-be79dd05b928

📥 Commits

Reviewing files that changed from the base of the PR and between 8e26679 and a84c877.

📒 Files selected for processing (4)

• .jules/sentinel.md
• internal/mcp/oauth.go
• internal/oauth/loopback.go
• internal/provideroauth/openrouter.go

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Walkthrough

Three OAuth callback HTTP servers now enforce a 10-second ReadHeaderTimeout. Existing callback handling remains unchanged. A Sentinel entry documents the missing timeout configuration and prevention guidance.

Changes

OAuth callback timeout configuration

Layer / File(s)	Summary
Configure OAuth callback timeouts internal/mcp/oauth.go, internal/oauth/loopback.go, internal/provideroauth/openrouter.go, .jules/sentinel.md	The three OAuth callback servers set a 10-second ReadHeaderTimeout. Existing callback validation, success handling, and error signaling remain in place. The Sentinel entry documents the configuration finding and prevention guidance.

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

Suggested reviewers: gnanam1990

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main security fix for the Slowloris (CWE-400) vulnerability.
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.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-cwe-400-slowloris-8093721826949726805

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[github-actions]

Zero automated PR review

Verdict: No blockers found

Blockers

• None found.

Validation

• [pass] Diff hygiene: git diff --check
• [pass] Tests: go test ./...
• [pass] Build: go run ./cmd/zero-release build
• [pass] Smoke build: go run ./cmd/zero-release smoke

Scope

Head: a84c877e5669
Changed files (4): .jules/sentinel.md, internal/mcp/oauth.go, internal/oauth/loopback.go, internal/provideroauth/openrouter.go

This deterministic review checks validation status and basic diff hygiene. A human reviewer still owns product judgment and design quality.