CVE-2026-55255 Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, an Insecure Direct Object Reference IDOR vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in...

EUVD-2026-38517

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, an Insecure Direct Object Reference IDOR vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in...

CVE-2026-55255

Langflow4: CVE-2026-55255 describes an IDOR in POST /api/v1/responses that lets an authenticated user execute another user’s flow by supplying the victim’s flow ID. Root cause: get_flow_by_id_or_endpoint_name queries by UUID without verifying ownership in both UUID and endpoint_name paths, enabli...

GHSA-QRPV-Q767-XQQ2 Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow

Summary Insecure Direct Object Reference IDOR vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. Details The vulnerability exists in the getflowbyidorendpointname helper...

Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow

Summary Insecure Direct Object Reference IDOR vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. Details The vulnerability exists in the getflowbyidorendpointname helper...

PT-2026-51099

Name of the Vulnerable Software and Affected Versions langflow versions prior to 1.9.1 Description An Insecure Direct Object Reference IDOR exists in the '/api/v1/responses' endpoint. This issue allows an authenticated attacker to execute any flow belonging to another user by specifying the...

CVE-2026-44556

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While...

CVE-2026-44556 Open WebUI: responses passthrough endpoint lacks access control authorization

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While...

EUVD-2026-30624

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While...

CVE-2026-44556 Open WebUI: responses passthrough endpoint lacks access control authorization

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While...

CVE-2026-44556

Open WebUI vulnerability CVE-2026-44556 affects the /api/openai/responses endpoint, where the proxy forwards requests to upstream LLMs without enforcing per-model access control. Pre-0.9.0, any authenticated user could interact with any configured model by POSTing to /responses with an arbitrary ...

Open WebUI 访问控制错误漏洞

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Prior to Open WebUI 0.9.0, there was an access control vulnerability. This vulnerability stemmed from the /responses endpoint in the OpenAI router, which accepted any authenticated user and directly...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization through the /responses endpoint, which fails to enforce per-model access control. An attacker can interact with any configured model, including those restricted by administrators, by...

Open WebUI's responses passthrough endpoint lacks access control authorization

Summary The /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While the primary chat completion endpoint generatechatcompletion checks model ownership, group membership, and...

GHSA-HP5M-24VP-VQ2Q Open WebUI's responses passthrough endpoint lacks access control authorization

Summary The /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While the primary chat completion endpoint generatechatcompletion checks model ownership, group membership, and...