CVE-2026-34070
7.5 · HIGHOverview
CVE-2026-34070 is a high-severity vulnerability affecting langchain langchain_core. It was published on March 31, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from langchain. Update langchain_core to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| langchain | langchain_core | >= 0, < 1.2.22 | Affected |
References
Frequently Asked Questions
What is CVE-2026-34070?
CVE-2026-34070 is a high-severity vulnerability affecting langchain langchain_core. It was published on March 31, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-34070?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-34070?
Check the references section for vendor advisories and patches from langchain. Update langchain_core to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-34070?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-34070 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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