CVE-2026-34070
7.5 HIGHLangChain is a framework for building agents and LLM-powered applications
Published: 2026-03-31 · Last updated: 2026-06-01
Severity and scoring
- CVSS
- 7.5 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CWE
- CWE-22
Affected products
| Vendor | Product |
|---|---|
| langchain | langchain_core |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-34070
- [Patch]https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c
- [Other]https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22
- [Vendor advisory]https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54
- [Vendor advisory]https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54
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- CVE-2026-44843 — LangChain is a framework for building agents and LLM-powered applications (8.2 HIGH)
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