High 7.5Published Mar 30, 2026

CVE-2026-34070LangChain Core has Path Traversal vulnerabilites in legacy `load_prompt` functions

Updated under an hour ago (Oct 27, 2026, 6:50 AM ET)

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It affects langchain-ai langchain and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for langchain-ai langchain

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Aug 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

langchain-ai langchain langchain_ai:langchain (from the name)	before 1.2.22	CNA record
Red Hat Red Hat Ansible Automation Platform 2.5 redhat:ansible_automation_platform	from 1780082949 not affected; from 1787229385 not affected	CISA ADP
Red Hat Red Hat OpenShift AI 3.3 redhat:openshift_ai	from 1782471587 not affected	CISA ADP
Red Hat OpenShift Lightspeed redhat:openshift_lightspeed	All versions	CISA ADP
langchain langchain_core langchain:langchain_core	before 1.2.22	NVD

References

References

https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54	x-refsource-confirm, exploit, vendor-advisory
https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c	x-refsource-misc, patch
https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22	x-refsource-misc, release-notes
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://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34070.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.