TI-2026-40010 Aliases CVE-2026-55443 GHSA-gr75-jv2w-4656

LangChain: Path traversal and sandbox escape in LangChain file-search middleware and loaders

LOW 24CWE-22Published 2026-06-22 · Updated 2026-06-22

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 5 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-22 and the CVSS impact.

Summary

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.3.9, several LangChain components that resolve filesystem paths or expand search patterns do not consistently confine the resolved path to the intended root directory. Affected behaviors include: a file-search agent middleware that validates a starting directory but not the search pattern or the resolved target of matched files, so glob patterns and symlinks can reach files outside the configured root; prompt- and chain/agent-configuration loaders that accept path fields and resolve them without confining the result to a trusted base or rejecting symlink targets; and path-prefix authorization checks that compare by string prefix without a path-segment boundary, so a sibling path sharing the prefix is accepted. When these components receive path values, search patterns, or workspace contents influenced by an untrusted source — including an LLM acting on untrusted input — the result can be disclosure of files outside the intended boundary. This vulnerability is fixed in 1.3.9.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0021 11th percentileScored 2026-11-07

Fix Partial langchain (langchain-ai): 1.3.9langchain-anthropic (langchain-ai): 1.4.6+2 more productsRed Hat: 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
langchain-ai	langchain	before 1.3.9	1.3.9	Patch available	CNA
langchain-ai	langchain-anthropic	before 1.4.6	1.4.6	Patch available	CNA
—	langchain (PyPI)	before 1.3.9	1.3.9	Patch available	GHSA-gr75-jv2w-4656
—	langchain-anthropic (PyPI)	before 1.4.6	1.4.6	Patch available	GHSA-gr75-jv2w-4656

langchain Vendorlangchain-ai Affected before 1.3.9 Fixed in 1.3.9 Patch available CNA
langchain-anthropic Vendorlangchain-ai Affected before 1.4.6 Fixed in 1.4.6 Patch available CNA
langchain (PyPI) Vendor— Affected before 1.3.9 Fixed in 1.3.9 Patch available GHSA-gr75-jv2w-4656
langchain-anthropic (PyPI) Vendor— Affected before 1.4.6 Fixed in 1.4.6 Patch available GHSA-gr75-jv2w-4656

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:langchain:langchain::::::::	before 1.3.9	Vulnerable	langchain-ai

cpe:2.3:a:langchain:langchain:*:*:*:*:*:*:*:* Versions before 1.3.9 Vulnerable ·langchain-ai

Remediation

Fix · CNA langchain (langchain-ai) Fixed in 1.3.9
Fix · CNA langchain-anthropic (langchain-ai) Fixed in 1.4.6
Fix · GHSA-gr75-jv2w-4656 langchain (PyPI) Fixed in 1.3.9 Advisory →
Fix · GHSA-gr75-jv2w-4656 langchain-anthropic (PyPI) Fixed in 1.4.6 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Exploit Intelligence	Affected	—
Migration Toolkit for Applications 8	Affected	No fix yet: Fix deferred
Red Hat Ansible Automation Platform 2	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux AI (RHEL AI) 3	Affected	No fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred

Not affected: 3 products

Ansible Automation Orchestrator 2026
OpenShift Lightspeed
Red Hat OpenShift AI (RHOAI)

Timeline

2026-10-02 Threatist record created from CVE-2026-55443
2026-10-03 Alias added: GHSA-gr75-jv2w-4656
2026-11-06 Affected versions changed · Red Hat
2026-11-06 CVSS score added · Red Hat

References

Patch 1

https://github.com/langchain-ai/langchain/commit/dcaf7795a3e6590af55c3ff7bda6add6355e9ea6

Advisory 2

Other 1

https://github.com/langchain-ai/langchain

TI-2023-20724 An issue in langchain langchain-ai v.0.0.232 and before allows a remote attacker to… CVSS 3.1CRITICAL 9.8
TI-2023-20706 An issue in LanChain-ai Langchain v.0.0.245 allows a remote attacker to execute arbitrary… CVSS 3.1CRITICAL 9.8
TI-2023-20166 An issue in Harrison Chase langchain v.0.0.194 and before allows a remote attacker to… CVSS 3.1CRITICAL 9.8
TI-2023-20136 An issue in LangChain v.0.0.231 allows a remote attacker to execute arbitrary code via the prompt parameter. CVSS 3.1CRITICAL 9.8
TI-2023-18185 An issue in langchain v.0.0.171 allows a remote attacker to execute arbitrary code via a… CVSS 3.1CRITICAL 9.8
TI-2023-18176 An issue in LangChain before 0.0.236 allows an attacker to execute arbitrary code because… CVSS 3.1CRITICAL 9.8

See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences