Langfuse: Improper role-based-access control in Langfuse LLM connection management allowed users of role “member” to retrieve stored LLM provider API keys_CVE-2026-41487

{
    "lastseen": "",
    "description": "Langfuse is an open source large language model engineering platform. From version 3.68.0 to before version 3.167.0, there is  a role-based-access control flaw in the LLM connection update flow. An authenticated, low-privileged user of role \u201cmember\u201d in a project could request the update of an existing LLM connection to an attacker-controlled baseUrl, causing Langfuse to reuse the stored provider secret and redirect the test request to an attacker-controlled endpoint. This could expose the plaintext provider LLM API key for that connection. The attack is only possible if a user is already part of a project and has \u201cmember\u201d scoped access. This issue has been patched in version 3.167.0.",
    "published": "2026-05-08T14:27:48.588Z",
    "modified": "2026-05-08T14:27:48.588Z",
    "type": "cve",
    "title": "Langfuse: Improper role-based-access control in Langfuse LLM connection management allowed users of role \u201cmember\u201d to retrieve stored LLM provider API keys",
    "source": "GitHub_M",
    "references": "https://github.com/langfuse/langfuse/security/advisories/GHSA-2524-j966-gfgh\nhttps://github.com/langfuse/langfuse/pull/13027\nhttps://github.com/langfuse/langfuse/pull/13055\nhttps://github.com/langfuse/langfuse/commit/7527bb0d84bc0a3dc24a4b16d22ed2e46e6dddff\nhttps://github.com/langfuse/langfuse/commit/e12386f9d4368bbfff24a4ad7fd53641091605ff\nhttps://github.com/langfuse/langfuse/releases/tag/v3.167.0",
    "id": "CVE-2026-41487",
    "bulletinFamily": "",
    "cwe": [
        "CWE-284"
    ],
    "cvelist": null,
    "sourceData": "langfuse langfuse >= 3.68.0, < 3.167.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "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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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "langfuse",
    "version": ">= 3.68.0, < 3.167.0",
    "vendor": "langfuse",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}