Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-34070

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 41.2%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-34070


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