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CVE-2026-55255 is a broken object-level authorization vulnerability in Langflow's OpenAI Responses-compatible endpoint. In affected releases, UUID-based flow resolution in get_flow_by_id_or_endpoint_name retrieves a flow without constraining the lookup to the authenticated user's ownership. An authenticated user can therefore provide another user's flow identifier in a request and cause that flow to execute. Endpoint-name resolution performed an ownership check, whereas the UUID resolution path did not. Langflow fixed the issue by enforcing an ownership check during UUID-based flow resolution.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
107 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An insecure direct object reference (IDOR) vulnerability in Langflow involving cross-user access to flows by flow ID. The supplied proof-of-concept/template tests whether a user can invoke another user's flow through the Langflow run API endpoint.
An insecure direct object reference (IDOR) vulnerability in Langflow involving cross-user access to flows by flow identifier, including the API run endpoint.
An insecure direct object reference vulnerability used with CVE-2026-33017 in credential-harvesting attacks.
A high-severity Langflow authorization-bypass vulnerability involving a user-controlled key.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.