CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2026-34070
High (7.5) in langchain langchain core. EPSS 1.4% chance of exploitation in the next 30 days. Fixed in langchain-core 1.2.22.
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.
Severity
- EPSS
- 1.4% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-31)
- CWE
- CWE-22
- Published
- Modified
- Record from
- the NVD, synced
Affected
- langchain:langchain_core
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-qh6h-p6c9-ff54 | PyPI | langchain-core | <1.2.22 | 1.2.22 |
| PYSEC-2026-2193 | PyPI | langchain-core | <1.2.22 | 1.2.22 |
References
- https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54
- https://access.redhat.com/errata/RHSA-2026:24766
- https://access.redhat.com/errata/RHSA-2026:37275