CVE-2026-34070

Description

LangChain is a framework for building agents and LLM-powered applications. Prior to version 1.2.22, multiple functions in langchain_core.prompts.loading read files from paths embedded in deserialized config dicts without validating against directory traversal or absolute path injection. When an application passes user-influenced prompt configurations to load_prompt() or load_prompt_from_config(), an attacker can read arbitrary files on the host filesystem, constrained only by file-extension checks (.txt for templates, .json/.yaml for examples). This issue has been patched in version 1.2.22.

CVSS Vector

References

• https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c
• https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22
• https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54
• https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54