chore(deps): bump langchain from 1.2.15 to 1.3.9 in /examples/fastapi-langchain

[dependabot]

Bumps langchain from 1.2.15 to 1.3.9.

Release notes

Sourced from langchain's releases.

langchain==1.3.9

Changes since langchain==1.3.8

release(anthropic): 1.4.6 (#38105) release(langchain): 1.3.9 (#38104) fix(langchain,anthropic): confine file-search results and tighten anthropic allowed_prefixes (#38106)

langchain==1.3.8

Changes since langchain==1.3.7

release(langchain): 1.3.8 (#38096) style(core,langchain,langchain-classic,partners): replace double backticks in docstrings (#38095) release(core): 1.4.6 (#38061) chore(langchain): add overloads to create_agent (#34309) chore(infra): bump mypy to 2.1 and unify type-check config across the monorepo (#36470) fix(langchain): support async middleware decorator typing (#34584) fix(langchain): tighten structured output model fallbacks (#38042) release(anthropic): 1.4.5 (#38036) hotfix(core): bump lockfile(s) (#38032) refactor(langchain): refactor test_create_agent_tool_validation (#34443)

langchain==1.3.7

Changes since langchain==1.3.6

release(langchain): 1.3.7 (#38024) style(langchain): add ruff rules ARG (#34435) feat(langchain): add ProviderToolSearchMiddleware (#37969) chore(langchain): activate mypy warn_return_any (#34249) test(langchain): mark legacy trigger view for 2.0 removal (#38002)

langchain==1.3.6

Changes since langchain==1.3.5

release(langchain): 1.3.6 (#38001) fix(langchain): preserve summarization trigger compatibility (#38000)

langchain==1.3.5

Changes since langchain==1.3.4

release(langchain): 1.3.5 (#37998) feat(langchain): port AND-capable trigger conditions to SummarizationMiddleware (#34576) hotfix(openai): min core dep (#37990) feat(openai): support apply_patch built-in tool (#37157) chore: bump pyarrow from 21.0.0 to 23.0.1 in /libs/langchain_v1 (#37930) chore: bump dependencies (#37892) chore: bump aiohttp from 3.13.4 to 3.14.0 in /libs/langchain_v1 (#37888)

langchain-openai==1.3.5

Changes since langchain-openai==1.3.4

... (truncated)

Commits

• 3bfb6a3 release(langchain): 1.3.9 (#38104)
• dcaf779 fix(langchain,anthropic): confine file-search results and tighten anthropic `...
• 0392b6b fix(core): fix Pydantic v1 support in tools/runnable (#33698)
• f6d63bc release(langchain): 1.3.8 (#38096)
• 5d20596 style(core,langchain,langchain-classic,partners): replace double backticks in...
• fb55c66 chore: bump langsmith from 0.8.9 to 0.8.14 in /libs/partners/huggingface (#38...
• 51daae5 chore: bump langsmith from 0.8.9 to 0.8.14 in /libs/partners/chroma (#38092)
• 70e9579 chore: bump langsmith from 0.8.9 to 0.8.14 in /libs/partners/fireworks (#38093)
• 6c0e9af chore: bump langsmith from 0.8.9 to 0.8.14 in /libs/partners/xai (#38094)
• 222dc84 ci(infra): clarify early PR auto-close guidance (#38090)
• Additional commits viewable in compare view

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	langchain@​1.3.9

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[socket-security]

Caution

Review the following alerts detected in dependencies.

According to your organization's Security Policy, you must resolve all "Block" alerts before proceeding. It is recommended to resolve "Warn" alerts too. Learn more about Socket for GitHub.

Action	Severity	Alert  (click "▶" to expand/collapse)
Block		Potential security risk (AI signal): pypi langgraph-checkpoint is 78.0% likely risky Notes: No explicit malware/backdoor behavior is visible (no networking or command execution). However, the persistent component uses pickle.load on data read from a caller-influenced filename without integrity/sandboxing, which can enable arbitrary code execution if attackers can tamper with the persisted pickle file or the path. Additionally, the checkpoint restoration path relies on a generic serde.loads_typed deserializer whose safety is not guaranteed by this module, compounding the risk if serde is unsafe. Confidence: 0.78 Severity: 0.84 From: examples/fastapi-langchain/uv.lock → pypi/langchain@1.2.15 → pypi/langchain@1.3.9 → pypi/langgraph-checkpoint@4.1.1 ℹ Read more on: This package | This alert | What are AI-detected potential security risks? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: An AI system identified potential security problems in this package. It is advised to review the package thoroughly and assess the potential risks before installation. You may also consider reporting the issue to the package maintainer or seeking alternative solutions with a stronger security posture. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore pypi/langgraph-checkpoint@4.1.1. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.
Warn		System shell access: pypi langgraph-checkpoint Location: Package overview From: examples/fastapi-langchain/uv.lock → pypi/langchain@1.2.15 → pypi/langchain@1.3.9 → pypi/langgraph-checkpoint@4.1.1 ℹ Read more on: This package | This alert | What is shell access? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Packages should avoid accessing the shell which can reduce portability, and make it easier for malicious shell access to be introduced. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore pypi/langgraph-checkpoint@4.1.1. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

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