CVE-2026-34070

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-22
• CWE-22

• https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47cPatch
• https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22Release Notes
• https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54Exploit, Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:24766
• https://access.redhat.com/errata/RHSA-2026:37275
• https://access.redhat.com/security/cve/CVE-2026-34070
• https://bugzilla.redhat.com/show_bug.cgi?id=2453287
• https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54Exploit, Vendor Advisory
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34070.json

Published

Mar 31, 2026

Last Modified

Jul 15, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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