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CVE-2026-55255 is an insecure direct object reference and broken object-level authorization vulnerability in Langflow affecting versions prior to 1.9.1. The flaw is present in the /api/v1/responses endpoint, which accepts a flow identifier and resolves flows through logic that, in the UUID-based lookup path, fails to verify that the authenticated requester owns or is authorized to execute the referenced flow. Reported analysis identifies the vulnerable lookup in get_flow_by_id_or_endpoint_name, where endpoint-name resolution enforced ownership checks but UUID resolution did not. As a result, any authenticated user who can supply a valid victim flow ID can cause execution of another user’s flow, including cross-tenant workflows in shared deployments. Because Langflow flows may embed provider API keys, cloud credentials, database connection material, and other secrets, unauthorized execution can expose sensitive data and abuse the victim’s configured integrations and resources.
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89 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
IDOR/BOLA authorization bypass vulnerability in Langflow's /api/v1/responses flow resolution logic that allows an authenticated user to execute another user's flow by supplying its UUID, potentially exposing embedded secrets such as API keys and cloud credentials.
A critical insecure direct object reference vulnerability affecting Langflow deployments, with potential exposure of workflows, API keys, and connected environments.
A critical IDOR / authorization bypass vulnerability in Langflow that allows an authenticated attacker to execute another user's flow via the `/api/v1/responses` endpoint, leading to cross-tenant data exposure and theft of embedded secrets such as API keys, cloud credentials, and database secrets.
A Langflow insecure direct object reference vulnerability that allows an authenticated user to execute another tenant's AI workflows and access associated secrets and credentials.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.