GHSA-9whx-c884-c68q · Severity: critical · Ecosystem: pip — Langflow Knowledge Bases API is Vulnerable to Path Traversal
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow is vulnerable to Path Traversal in the Knowledge Bases API (DELETE /api/v1/knowledge_bases). This occurs because user-supplied knowledge base names are concatenated directly into file paths without proper sanitization or boundary validation. An authenticated attacker can exploit this flaw to delete arbitrary directories anywhere on the server's filesystem, leading to data loss and potential service disruption. This vulnerability is fixed in 1.9.0.
Conclusion & alert: CVE-2026-42048 is rated Exploit Available (57.7/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.04%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-13 | — | 0.04% | — |
Full EPSS history (1 record total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.6 | 3.1 | CRITICAL |
|
3.1 | 5.8 | [email protected] |
GHSA-9whx-c884-c68q · Severity: critical · Ecosystem: pip — Langflow Knowledge Bases API is Vulnerable to Path Traversal
| URL | Tags |
|---|---|
| https://github.com/langflow-ai/langflow/security/advisories/GHSA-9whx-c884-c68q | Exploit Vendor Advisory |