CVE-2026-34070

HIGH EPSS 60.7%
Published Mar 31, 20263mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 31, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
60.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 1

VendorProductVersionRange
langchainlangchain_core* <1.2.22

References 3

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

Remediation

  • github.com https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c
    Patch