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CVE-2026-34070

LangChain Core has Path Traversal vulnerabilites in legacy `load_prompt` functions

Published: Mar 31, 2026Updated: Jun 30, 2026 Sources: CVE List NVDCWE-22
7.5HIGH
NVD MITRE
EPSS Score
1.2%
Top 36.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-22

Affected Products

langchain
oss-projectaka langchain-experimental, langchain core
langchain coreLibrary
AI / ML / ml-framework
langchain-ai
oss-projectaka langgraph, langchain-ai/langchain, langchain
langchainMixed
AI / ML / ai-agent-tooling

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c
github.com
https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22
github.com
https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54
github.com
and 4 more references View all →

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