CVE-2026-33017 Details.
Langflow < 1.9.0 - Remote Code Execution
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-2026-33017. What It Means.
Langflow versions prior to 1.9.0 are vulnerable to unauthenticated remote code execution (RCE) via the build_public_tmp endpoint. Attackers can submit a manipulated flow JSON containing Python code that is executed during the build process without proper sandboxing.
Affected Product. What Is Hit.
- Vendor
- langflow
- Product
- Langflow
FAQ
Common Questions.
Langflow < 1.9.0 - Remote Code Execution. Langflow versions prior to 1.9.0 are vulnerable to unauthenticated remote code execution (RCE) via the build_public_tmp endpoint. Attackers can submit a manipulated flow JSON containing Python code that is executed during the build process without proper sandboxing.
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-2026-33017 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
Yes. CVE-2026-33017 is on the CISA Known Exploited Vulnerabilities list, which means attackers have used it against real targets.
Update 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-2026-33017. Atlas does not run a check for it, so nothing here says whether a particular site is affected.