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TI-2026-26395 Aliases CVE-2026-34070GHSA-qh6h-p6c9-ff54

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

Priority HIGH 72CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 2 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. 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 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01436 73rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial langchain (langchain-ai): 1.2.22langchain-core (PyPI): 1.2.22Red Hat: 3 advisoriesRed Hat: 2 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
langchain-ailangchainbefore 1.2.221.2.22Patch availableCNA
—langchain-core (PyPI)before 1.2.221.2.22Patch availableGHSA-qh6h-p6c9-ff54
  • langchain Vendorlangchain-ai Affected before 1.2.22 Fixed in 1.2.22 Patch available CNA
  • langchain-core (PyPI) Vendor— Affected before 1.2.22 Fixed in 1.2.22 Patch available GHSA-qh6h-p6c9-ff54

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:langchain:langchain_core:*:*:*:*:*:python:*:*before 1.2.22Vulnerablelangchain-ai
  • cpe:2.3:a:langchain:langchain_core:*:*:*:*:*:python:*:* Versions before 1.2.22 Vulnerable ·langchain-ai

Remediation

  • Fix · CNA langchain (langchain-ai) Fixed in 1.2.22
  • Fix · GHSA-qh6h-p6c9-ff54 langchain-core (PyPI) Fixed in 1.2.22 Advisory →

Red Hat 3 advisories

  • RHSA-2026:59159 Released 2026-08-24 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.5 Container Release Update
    • Red Hat Ansible Automation Platform 2.5 registry.redhat.io/ansible-automation-platform-25/controller-rhel8, registry.redhat.io/ansible-automation-platform-25/hub-rhel8, registry.redhat.io/ansible-automation-platform-25/lightspeed-rhel8
  • RHSA-2026:37275 Released 2026-07-09 · Red Hat rating Critical
    RHOAI 3.3.5 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-operator-controller-rhel9, registry.redhat.io/rhoai/odh-feast-operator-rhel9 +45
  • RHSA-2026:24766 Released 2026-06-09 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.5 Container Release Update
    • Red Hat Ansible Automation Platform 2.5 registry.redhat.io/ansible-automation-platform-25/lightspeed-rhel8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
OpenShift LightspeedAffectedNo fix yet
Red Hat Ansible Automation Platform 2AffectedNo fix planned: Will not fix
Red Hat Ansible Automation Platform 2.5Fixed RHSA-2026:24766, RHSA-2026:59159
Red Hat OpenShift AI 3.3Fixed RHSA-2026:37275
Not affected: 3 products
  • Red Hat Ansible Automation Platform 2.5
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift AI 3.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34070
  2. 2026-10-03 Alias added: GHSA-qh6h-p6c9-ff54

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2025-42157 LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs CVSS 3.1CRITICAL 9.3
  • TI-2026-28915 LangChain has incomplete f-string validation in prompt templates CVSS 3.1MEDIUM 5.3
  • TI-2026-21027 LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages CVSS 3.1LOW 3.7

Sources

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