CVE-2026-34070 in langchain-ai langchain

Résumé (Anglaise)

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.

Responsable

GitHub_M

Réserver

25/03/2026

Divulgation

31/03/2026

Entrées

VulDB provides additional information and datapoints for this CVE:

ID	Vulnérabilité	CWE	Exp	Con	CVE
354312	langchain-ai langchain load_prompt_from_config directory traversal	22	Non défini	Correctif officiel	CVE-2026-34070