CVE-2026-34070
LangChain Core has Path Traversal vulnerabilites in legacy `load_prompt` functions
- State
- Published
- Severity
- 7.5 High
- Published
- Mar 31, 2026
- Updated
- Aug 25, 2026
- Reserved
- Mar 25, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | GitHub_M |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | redhat-SADP |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
langchainlangchain-ai |
|
References
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54
- https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22
- https://access.redhat.com/security/cve/CVE-2026-34070vdb-entry
- RHBZ#2453287issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34070.json
- https://access.redhat.com/errata/RHSA-2026:24766vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:59159vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:37275vendor-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.