LangChain Core has Path Traversal vulnerabilites in legacy `load_prompt` functions_CVE-2026-34070

{
    "lastseen": "",
    "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.",
    "published": "2026-03-31T02:01:49.320Z",
    "modified": "2026-03-31T18:04:59.283Z",
    "type": "cve",
    "title": "LangChain Core has Path Traversal vulnerabilites in legacy `load_prompt` functions",
    "source": "GitHub_M",
    "references": "https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54\nhttps://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c\nhttps://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22",
    "id": "CVE-2026-34070",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22"
    ],
    "cvelist": null,
    "sourceData": "langchain-ai langchain < 1.2.22",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "langchain",
    "version": "< 1.2.22",
    "vendor": "langchain-ai",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}