CVE-2026-48519— Langflow: Unauthenticated RCE in Shareable Playgrounds
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I. Basic Information for CVE-2026-48519
Vulnerability Information
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Vulnerability Title
Langflow: Unauthenticated RCE in Shareable Playgrounds
Source: NVD (National Vulnerability Database)
Vulnerability Description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, the "Shareable Playground" (or "Public Flows" in code) contains a critical RCE vulnerability. Shareable Playground feature works by enabling the execution of workflows by unauthenticated users, by accessing a link. Specifically, it enables the route /api/v1/build_public_tmp to execute any public flow, given a public flow ID. When the route executes the flow, it allows for providing arbitrary custom Python code as the nodes code, inside the JSON payload. The vulnerable field is data.nodes[X].data.node.template.code.value. This vulnerability is fixed in 1.9.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| langflow-ai | langflow | < 1.9.2 | - |
II. Public POCs for CVE-2026-48519
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-48519 (1)
Same Patch Batch · langflow-ai · 2026-06-23 · 9 CVEs total
| CVE-2026-55255 | 9.9 CRITICAL | Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attacker |
| CVE-2026-55447 | 9.6 CRITICAL | Langflow: BaseFileComponent-based nodes arbitrary file read with RCE exploit |
| CVE-2026-55450 | 9.3 CRITICAL | Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak |
| CVE-2026-33760 | 8.8 HIGH | Langflow: IDOR/BOLA in Monitor API — Missing Ownership Enforcement on 7 Endpoints |
| CVE-2026-55446 | 7.5 HIGH | Langflow: Unauthenticated DoS through multipart form boundary file upload |
| CVE-2026-42867 | 6.5 MEDIUM | Langflow: Path Traversal in Knowledge Bases API via Creation Endpoint |
| CVE-2026-48520 | 6.1 MEDIUM | Langflow: Unauthenticated Shareable Playground arbitrary local or S3 file read |
| CVE-2026-55423 | 6.1 MEDIUM | Langflow: Logout button does not clear session |
IV. Related Vulnerabilities
Same product: langflow
- CVE-2026-48520
Langflow: Unauthenticated Shareable Playground arbitrary loc - CVE-2026-33760
Langflow: IDOR/BOLA in Monitor API — Missing Ownership Enfor - CVE-2026-42867
Langflow: Path Traversal in Knowledge Bases API via Creation - CVE-2026-55255
Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint - CVE-2026-55423
Langflow: Logout button does not clear session
Same vendor: langflow-ai
- CVE-2026-48520
Langflow: Unauthenticated Shareable Playground arbitrary loc - CVE-2026-33760
Langflow: IDOR/BOLA in Monitor API — Missing Ownership Enfor - CVE-2026-42867
Langflow: Path Traversal in Knowledge Bases API via Creation - CVE-2026-55255
Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint - CVE-2026-55423
Langflow: Logout button does not clear session
Same weakness: CWE-94
V. Comments for CVE-2026-48519
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