Vulnerability Details CVE-2026-5027
The 'POST /api/v2/files' endpoint does not sanitize the 'filename' parameter from the multipart form data, allowing an attacker to write files to arbitrary locations on the filesystem using path traversal sequences ('../').
Exploit prediction scoring system (EPSS) score
EPSS Score 0.314
EPSS Ranking 98.1%
CVSS Severity
CVSS v3 Score 8.8
Products affected by CVE-2026-5027
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cpe:2.3:a:langflow:langflow:0.5.0
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cpe:2.3:a:langflow:langflow:0.6.0
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cpe:2.3:a:langflow:langflow:0.6.3
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cpe:2.3:a:langflow:langflow:0.6.4
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cpe:2.3:a:langflow:langflow:0.6.5
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cpe:2.3:a:langflow:langflow:0.6.7
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cpe:2.3:a:langflow:langflow:1.4.1
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cpe:2.3:a:langflow:langflow:1.4.2
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cpe:2.3:a:langflow:langflow:1.4.3
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cpe:2.3:a:langflow:langflow:1.5.0
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cpe:2.3:a:langflow:langflow:1.5.1
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cpe:2.3:a:langflow:langflow:1.6.0
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cpe:2.3:a:langflow:langflow:1.6.1
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cpe:2.3:a:langflow:langflow:1.6.3
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cpe:2.3:a:langflow:langflow:1.6.4
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cpe:2.3:a:langflow:langflow:1.6.5
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cpe:2.3:a:langflow:langflow:1.6.6
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cpe:2.3:a:langflow:langflow:1.7.2
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cpe:2.3:a:langflow:langflow:1.7.3
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cpe:2.3:a:langflow:langflow:1.8.0
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cpe:2.3:a:langflow:langflow:1.8.1