CVE-2026-34070
LangChain Core has Path Traversal vulnerabilites in legacy `load_prompt` functions
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | langchain-ai |
| Product | langchain |
| Published | Mar 31, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
langchain-ai / langchain
< 1.2.22
References
github.com: https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54 github.com: https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c github.com: https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-34070 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2453287 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34070.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24766 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37275