LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages_CVE-2026-26013

{
    "lastseen": "",
    "description": "LangChain is a framework for building agents and LLM-powered applications. Prior to 1.2.11, the ChatOpenAI.get_num_tokens_from_messages() method fetches arbitrary image_url values without validation when computing token counts for vision-enabled models. This allows attackers to trigger Server-Side Request Forgery (SSRF) attacks by providing malicious image URLs in user input. This vulnerability is fixed in 1.2.11.",
    "published": "2026-02-10T21:51:07.741Z",
    "modified": "2026-02-10T21:51:07.741Z",
    "type": "cve",
    "title": "LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages",
    "source": "GitHub_M",
    "references": "https://github.com/langchain-ai/langchain/security/advisories/GHSA-2g6r-c272-w58r\nhttps://github.com/langchain-ai/langchain/commit/2b4b1dc29a833d4053deba4c2b77a3848c834565\nhttps://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.11",
    "id": "CVE-2026-26013",
    "bulletinFamily": "",
    "cwe": [
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "langchain-ai langchain < 1.2.11",
    "sourceHref": "",
    "cvss": {
        "score": 3.7,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
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            "privilegesRequired": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "langchain",
    "version": "< 1.2.11",
    "vendor": "langchain-ai",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}