[seonghobae]

🚨 Severity: MEDIUM
💡 Vulnerability: SSRF 필터링 로직 중 호스트네임이 정확히 "internal"일 경우를 차단하지 못하는 취약점이 있었습니다.
🎯 Impact: 공격자가 https://internal/... 형식의 Webhook URL을 등록해 내부망 자원에 접근할 수 있습니다.
🔧 Fix: backend/api/tools.py의 validate_webhook_url_details 함수에서 호스트네임 검증 시 정확히 "internal"인 경우도 차단하도록 hostname == "internal" 조건을 추가했습니다.
✅ Verification: 관련 test_tools_api.py 테스트 코드에도 https://internal을 차단하는지 검증하는 테스트를 추가하였으며, pytest 전체 통과를 확인했습니다.

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PR created automatically by Jules for task 11409230068183996832 started by @seonghobae

Summary by CodeRabbit

• Bug Fixes
  • Webhook URL validation now rejects the exact hostname internal, in addition to .internal and .local hostnames.

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ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Repository: ContextualWisdomLab/naruon/.coderabbit.yaml
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📥 Commits

Reviewing files that changed from the base of the PR and between 042b0c7 and 068c574.

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📒 Files selected for processing (3)

• .jules/sentinel.md
• backend/api/tools.py
• backend/tests/test_tools_api.py

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📝 Walkthrough

Walkthrough

Webhook hostname validation now rejects the exact hostname internal, in addition to .internal and .local suffixes. The tests cover https://internal, and a sentinel entry documents the exact-hostname case.

Changes

Webhook hostname validation

Layer / File(s)	Summary
Exact hostname check and coverage backend/api/tools.py, backend/tests/test_tools_api.py, .jules/sentinel.md	The validator rejects the exact hostname internal. A test covers https://internal, and the sentinel entry documents the case. The test parameterization and surrounding whitespace were also reformatted.

Priority: ⬆️ High

Estimated code review effort: 2 (Simple) | ~8 minutes

Change: Bug fix

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Merge Risk: ⚪ Minimal · up to 068c5

The reported webhook hostname gap is addressed, and no actionable merge-blocking risk remains after normal checks.

Pre-merge checks | 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title accurately identifies the internal-network SSRF bypass fix, which is the main change in the pull request.
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.

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