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Issue title

Duplicated implementation block across source files

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Top 5 (default)
Severity Rule Title File:line
HIGH SEC029 [SEC029] Server-Side Request Forgery (SSRF) — outbound HTTP from user input: Outbound HTT… .github/scripts/get_min_versions.py:51
MED CFG006 [CFG006] Missing .gitignore: No .gitignore file. Risk of committing secrets and build art… —
MED AUC001 [AUC001] No Repobility access matrix policy found: The repository uses web/API frameworks… —
MED AGT012 Agent control bridge may listen on a network interface without visible auth libs/core/langchain_core/_security/_pol…:4
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/utils/iter.py:75
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/tracers/event_…:523
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/tools/structur…:52
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/runnables/rout…:72
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/runnables/rout…:67
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/runnables/pass…:305
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/runnables/pass…:303
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/runnables/grap…:53
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/runnables/fall…:104
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/messages/tool.…:104
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/messages/syste…:21
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/messages/syste…:20
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/messages/human…:21
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/messages/block…:8
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/messages/block…:9
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/messages/base.…:99
LOW AIC003 Duplicated implementation block across source files libs/core/langchain_core/_api/deprecati…:159
LOW AIC002 Source file name looks like an AI patch artifact libs/core/langchain_core/messages/block…:1
Reset to top 5 22 findings available (after auto-suppression of test files + won't-fix)

Issue body (markdown)

## Code-quality scan: `langchain-ai/langchain`

**Score: 81/100 (B+)**  ·  22 findings  ·  scanned 2026-05-17 20:12 UTC  ·  98,327 LOC

| Severity | Count |
|---|---|
| CRITICAL | 0 |
| HIGH | 1 |
| MEDIUM | 3 |
| LOW | 18 |

📊 [Full filterable report](https://repobility.com/scan/cff7a5c6-b915-422d-8426-534920da719d/)  ·  ![scorecard](https://repobility.com/scan/cff7a5c6-b915-422d-8426-534920da719d/report.png?v=1779048744-s2)

### Top findings

1. **HIGH** `SEC029` — Server-Side Request Forgery (SSRF) — outbound HTTP from user input
   `.github/scripts/get_min_versions.py:51` · A10:2021 SSRF
2. **MEDIUM** `CFG006` — Missing .gitignore
3. **MEDIUM** `AUC001` — No Repobility access matrix policy found
4. **MEDIUM** `AGT012` — Agent control bridge may listen on a network interface without visible auth
   `libs/core/langchain_core/_security/_policy.py:4`
5. **LOW** `AIC003` — Duplicated implementation block across source files
   `libs/core/langchain_core/utils/iter.py:75`

---

**Security note**: this issue is public. If any flagged finding is a real, exploitable vulnerability, please redirect to your `SECURITY.md` policy or open a [private security advisory](https://docs.github.com/en/code-security/security-advisories/guidance-on-reporting-and-writing-information-about-vulnerabilities/privately-reporting-a-security-vulnerability) instead. We're happy to close this and re-submit privately.

---

_Filed automatically. Close this issue if not useful — we won't refile. Full report: https://repobility.com/scan/cff7a5c6-b915-422d-8426-534920da719d/_
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