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

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-34070
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-31 03:15:58 UTC
Updated2026-04-01 14:24:02 UTC
DescriptionLangChain 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.001920000 probability, percentile 0.410940000 (date 2026-04-01)

Problem Types: CWE-22 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Langchain-ai Langchain affected < 1.2.22 Not specified

References

ReferenceSourceLinkTags
github.com/langchain-ai/langchain/commit/27add913474e01e33bededf40961511... [email protected] github.com
github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22 [email protected] github.com
github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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