CVE catalog
CVE-2026-55450
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for an
- Severity
- Critical · CVSS 9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.19% · Oct 25, 2026
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This can lead to space exhaustion on the server. In addition, in the response, the absolute path of the uploaded file is reported to the attacker, which is an information leak that can assist in chaining other primitives. This vulnerability is fixed in 1.9.1.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | langflow | Not reported | 1.9.1 | fixed |
| Cpe | langflow | Not reported | 1.9.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | langflow | cpe | Not reported | 1.9.1 | Not reported | Not reported | Not reported |
| Cpe | langflow | cpe | Not reported | 1.9.1 | Not reported | NVD-CVE-2026-55450 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://github.com/langflow-ai/langflow/pull/12831]
- [https://github.com/langflow-ai/langflow/security/advisories/GHSA-x223-p2gf-v735]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-55450]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1970.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)]