CVE-2026-5027 Details.
Langflow <= 1.8.4 - Path Traversal to RCE via File Upload
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-5027. What It Means.
The application contains a path traversal vulnerability caused by unsanitized 'filename' parameter in the 'POST /api/v2/files' multipart form data, letting attackers write files to arbitrary filesystem locations, exploit requires crafted request.
Affected Product. What Is Hit.
- Vendor
- langflow-ai
- Product
- Langflow Ai Langflow
More CVEs In Langflow Ai Langflow.
- CVE-2026-0768CriticalInformation onlyLangflow <=1.2.x - Unauthenticated Remote Code Execution via validate_codeLangflow AiCVSS9.8
- CVE-2026-9103CriticalInformation onlyLangflow OSS - Superuser Token IssuanceLangflow AiCVSS9.8
- CVE-2026-21445CriticalInformation onlyLangflow - Broken Access ControlLangflow AiCVSS9.1
FAQ
Common Questions.
Langflow <= 1.8.4 - Path Traversal to RCE via File Upload. The application contains a path traversal vulnerability caused by unsanitized 'filename' parameter in the 'POST /api/v2/files' multipart form data, letting attackers write files to arbitrary filesystem locations, exploit requires crafted request.
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-5027 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-5027 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update Langflow Ai Langflow to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-5027. Atlas does not run a check for it, so nothing here says whether a particular site is affected.