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[GHSA-577h-p2hh-v4mv] Langflow CORS Account Takeover and RCE #6665

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[GHSA-577h-p2hh-v4mv] Langflow CORS Account Takeover and RCE #6665

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38 changes: 29 additions & 9 deletions advisories/unreviewed/2025/12/GHSA-577h-p2hh-v4mv/GHSA-577h-p2hh-v4mv.json
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{
"schema_version": "1.4.0",
"id": "GHSA-577h-p2hh-v4mv",
"modified": "2026-01-16T21:30:30Z",
"modified": "2026-01-16T21:31:35Z",
"published": "2025-12-06T00:31:36Z",
"aliases": [
"CVE-2025-34291"
],
"details": "Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints — including built-in code-execution functionality — allowing the attacker to execute arbitrary code and achieve full system compromise.",
"summary": "Langflow CORS misconfiguration enables Account Takeover and RCE",
"details": "Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints, including built-in code-execution functionality, allowing the attacker to execute arbitrary code and achieve full system compromise.",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"
}
],
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "langflow"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.1"
}
]
}
],
"database_specific": {
"last_known_affected_version_range": "<= 1.6.9"
}
}
],
"affected": [],
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34291"
},
{
"type": "WEB",
"type": "PACKAGE",
"url": "https://github.com/langflow-ai/langflow"
},
{
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