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CVE-2026-8476 is a critical remote code execution vulnerability in IBM Langflow OSS versions 1.0.0 through 1.10.0. The flaw resides in the disk-based caching mechanism, where the AsyncDiskCache class deserializes cached objects from disk using Python's pickle.loads() without validation, integrity verification, or authentication. Because pickle deserialization can execute attacker-controlled code during object reconstruction, any malicious payload that reaches the cache can be executed by the Langflow server. The issue is classified as CWE-502 and affects deployments in which an attacker can influence cached data through workflow inputs, custom components, API manipulation, or file-system-level access to cache contents.
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A critical unsafe deserialization vulnerability in Langflow OSS AsyncDiskCache that can allow arbitrary code execution via malicious pickle data.
A critical remote code execution vulnerability in IBM Langflow OSS caused by unsafe pickle deserialization in the disk-based cache mechanism.
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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.
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