🛡️ CVE-2026-34070
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-22 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity High
CVSS Score 8.0
CVSS Vector N/A
CWE CWE-22
Public Exploit ✅ No
Source NVD
Published 2026-03-31
Updated 2026-06-15
Modified N/A

Affected Packages

Software From version Fixed in
langchain — 1.2.22
langchain-core — 1.2.22

References

N/A

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