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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c	Patch
https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22	Release Notes
https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54	Exploit Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:24766
https://access.redhat.com/errata/RHSA-2026:37275
https://access.redhat.com/errata/RHSA-2026:59159
https://access.redhat.com/security/cve/CVE-2026-34070
https://bugzilla.redhat.com/show_bug.cgi?id=2453287
https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54	Exploit Vendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34070.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:langchain:langchain_core:*:*:*:*:*:python:*:*

History

No history.

Information

Published : 2026-03-31 03:15

Updated : 2026-08-25 13:18

NVD link : CVE-2026-34070

Mitre link : CVE-2026-34070

CVE.ORG link : CVE-2026-34070

JSON object : View

Products Affected

langchain

langchain_core

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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