CVE-2026-21445 Details.
Langflow - Broken Access Control
Atlas does not check this one. Works by exploiting the flaw.
The only reliable test for this one is to try the weakness itself, which can disturb the site. Atlas does not do that, so it does not run this check.
About CVE-2026-21445. What It Means.
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization.
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-2026-5027HighInformation onlyLangflow <= 1.8.4 - Path Traversal to RCE via File UploadLangflow AiCVSS8.8
FAQ
Common Questions.
Langflow - Broken Access Control. Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization.
No. The only reliable test for this one is to try the weakness itself, which can disturb the site. Atlas does not do that, so it does not run this check. The facts about CVE-2026-21445 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-21445 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-2026-21445. Atlas does not run a check for it, so nothing here says whether a particular site is affected.