CVE-2026-55450Langflow is a tool for building and deploying AI-powered agents and workflows.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.3 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H
- Weakness (CWE)
- CWE-200, CWE-306, CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
langflow langflow langflow:langflow | before 1.9.1 | NVD |
References
- https://github.com/langflow-ai/langflow/pull/12831issue-tracking, patch
- https://github.com/langflow-ai/langflow/security/advisories/GHSA-x223-p2gf-v735exploit, patch, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.