GHSA-qh6h-p6c9-ff54: LangChain Core has Path Traversal vulnerabilites in legacy `load_prompt` functions

Summary

Multiple functions in `langchain_core.prompts.loading` read files from paths in deserialized config dicts without checking for absolute paths or `..` traversal. When an application passes user-influenced prompt configurations to `load_prompt()` or `load_prompt_from_config()`, an attacker can read arbitrary host files, limited only by `.txt`, `.json`, `.yaml` and `.yml` extension checks.

Mitigation

Update `langchain-core` to >= 1.2.22. The fix rejects absolute paths and `..` sequences by default, with an `allow_dangerous_paths=True` argument for trusted inputs. The legacy APIs are deprecated and will be removed in 2.0.0; migrate to `dumpd`/`dumps`/`load`/`loads` from `langchain_core.load`.

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

• langchain-corePyPILLM dependency since 2023-11-20 · 60 tracked dependents

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