CVE-2026-34070LangChain is a framework for building agents and LLM-powered applications.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
langchain langchain_core langchain:langchain_core | before 1.2.22 | NVD |
References
- 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/errata/RHSA-2026:59159
- https://access.redhat.com/security/cve/CVE-2026-34070
- https://bugzilla.redhat.com/show_bug.cgi?id=2453287
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34070.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.